New and used Grand Design RVs for sale

Used 2021 Grand Design Momentum 399TH

$89,995.00
BRETZ RV & MARINE BOISE, ID
Boise, ID

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Grand Design Momentum toy hauler 399TH highlights: ~OPTIONS LISTED BY MANUFACTURER,ACTUAL OPTIONS MAY VARY~ Dual Entry Full and Half Bath Exterior LED TV 13' Separate Garage Loft Fold-Down Side Patio Whatever your idea of adventure is, this Momentum toy hauler will make it even better! The fold-down side patio is the perfect party space, especially since there is also an exterior LED TV, and back on the interior, you'll find three more LED TVs for entertainment while staying indoors. The front master suite is going to provide you with the most comfort while you sleep, and the electric fireplace within the main living area is going to provide you with an extra bit of heat on chilly nights. The kitchen has an island with bar stools so that you can sit down and chat with the chef, and you can also choose to sit back in the theater seating with heat/massage to relax after a long day of biking or hiking. If you would prefer to have a residential refrigerator, you should check out model 399TH-R! The very best adventures are waiting for you with the Grand Design Momentum toy hauler! The Momentum combines extreme play with extraordinary living so that you can have the best of both worlds. You won't have to miss out on any of your favorite features from home because the Momentum has just about everything. With the Weather-Tek insulation, you won't have to let anything hold you back from getting out and taking an adventure during any season, and the Tuff Ply gas-and-oil-resistant garage flooring is a quality base for your toys. The flush-mount tie-downs rated for 2,500 LBS will keep your gear in place as you travel, and there is a protective diamond plate on the garage sidewalls for additional protection. Some of the options that you can choose to add to your Momentum are the Solitude solar system and Rockford Fosgate speaker package.

New 2024 Grand Design Momentum 399TH

$89,997.00
ST GEORGE,UT

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Grand Design Momentum fifth wheel toy hauler 399TH highlights: Fold-Down Side Patio 13' Garage Bath and a Half Dual Entry Smart Sink Fireplace Get ready for a lot of fun when you head out to the off-road park, a special event, or a long trip with your toys! You will love the garage with the Fast Ramp rear ramp door, the Ram-Air garage vents on both sides, the 2,500 lb. rated flush-mount tie-downs and the protective diamond plate on the garage sidewalls. This area can become a bedroom or an extra living area if you want to add Happi-Jac rollover sofas/table with a top bed option, plus you will already have a half bath for convenience, an overhead loft bed plus a flip-up pet dish for your furry friends. The living and kitchen area is spacious with dual slides and a kitchen island with bar stools, a free standing dinette and theatre seating. The fold-down side patio offers a great place to relax outdoors above ground, and there are many more features to enjoy plus several options to customize your fifth wheel. The Momentum fifth wheel toy haulers by Grand Design are built for four seasons of travel with your off-road toys and include luxurious accommodations throughout for extreme living! Each is constructed to a superior standard with the thermal roof design, the full-laminated walls, and the triple insulated garage floor. The MORryde CRE3000 suspension system and rubber pin box, plus the upgraded axle hangers provide the performance and smooth towing you desire, while the interior offers luxury such as color changing LED accent lighting, raised panel hardwood cabinet doors with hidden hinges, and a central vacuum system. Each toy hauler also includes four packages, including the Garage Package with Tuff-Ply gas and oil resistant flooring, the Weather-Tek Package with a Stealth AC System, and the Interior Luxury Package with solid surface countertops!

Used 2022 Grand Design Momentum 399TH

$99,995.00
CAMPERS INN RV MERRIMACK, NH
Merrimack, NH

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Used 2022 Grand Design Momentum 399TH – Luxury Toy Hauler Meets Family Adventure Turn every getaway into an unforgettable experience with the Used 2022 Grand Design Momentum 399TH, a top-tier toy hauler that combines residential comfort, generous living space, and serious utility for adventurers who refuse to compromise. Whether you’re hauling ATVs, motorcycles, or outdoor toys, this Momentum model delivers strength, style, and comfort in one striking package. Spacious, Functional Interior Designed for Real LivingStep inside and be impressed by the expansive floorplan that feels more like a luxury home than a traditional toy hauler. The sizeable living area features stylish seating, a slide-out that expands space for comfort, and wide panoramic windows that draw in natural light and scenic views. Plush furniture creates an inviting environment for relaxing, socializing, and making every moment on the road feel special. The fully equipped kitchen rivals many residential spaces. With a residential-size refrigerator, three-burner stove, oven, microwave, and substantial counter space, meal prep becomes a joy rather than a chore. Thoughtful storage solutions keep cookware, utensils, and pantry items neatly organized, and the dining area offers plenty of room for meals, game nights, or planning tomorrow’s adventure. Toy Hauler Flexibility Without CompromiseOne of the standout features of the Momentum 399TH is its spacious garage area—designed to handle your toys and gear with ease. Whether you’re loading up off-road vehicles, bikes, or camping gear, this trailer’s oversized garage delivers durability and convenience. The adjustable tie-downs and ramp door make loading and unloading a breeze, while integrated storage keeps gear secure during travel. The front master suite offers a private, restful retreat with a comfortable bed, generous storage, and a layout crafted for rest and relaxation. The full bathroom includes a shower with skylight, vanity, and toilet, giving you all the comforts of home no matter how rugged your journey. Interior and exterior storage compartments throughout the coach keep your belongings organized and accessible. Entertainment and Comfort on Every TripWith climate control systems to support year-round comfort and entertainment options throughout the interior, the Momentum 399TH isn’t just rugged—it’s rich in amenities. Whether you’re hosting movie night after a day in the outdoors or curling up with a book while the world goes by, this toy hauler offers living space that works for families, couples, and adventurers alike. Why Buy This Used RV?Choosing the Used 2022 Grand Design Momentum 399TH means you’re getting best-in-class features, quality construction, and residential comfort at a fraction of the price of a new unit. With its flexible garage design, generous living space, and upscale amenities, this toy hauler is perfect for families, thrill seekers, and anyone who wants to combine utility with comfort. Its strong build and thoughtful layout make it ideal for long trips, seasonal travel, and weekend adventures alike—offering you versatility and value in every mile. Why Buy from Campers Inn RV?At Campers Inn RV, we make RV ownership easy, supportive, and enjoyable. Every used RV in our inventory undergoes a comprehensive inspection to ensure it’s road-ready and dependable, so you can travel with confidence. Our experienced RV specialists provide personalized guidance to help you find the right model for your lifestyle and travel goals. We also offer flexible financing options tailored to your budget and ongoing support long after your purchase. With decades of industry experience and a nationwide network of locations and service partners, Campers Inn RV stands behind your adventure from day one and beyond. The Used 2022 Grand Design Momentum 399TH delivers luxury, flexibility, and rugged capability in one exceptional toy hauler. Visit your local Campers Inn RV today to explore this model in person and start planning your next great adventure with confidence.

Used 2022 Grand Design Momentum 399TH

$69,998.00
TAMPA, FL

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Discover the perfect blend of comfort, luxury, and adventure with this preowned 2022 Grand Design Momentum 399TH, available now from LazyDays powered by Campers Inn. Designed for travel enthusiasts and families who love to hit the road, this toy hauler offers everything you need for unforgettable trips. Step inside to find a spacious, modern interior with thoughtful layouts that make extended travel effortless. The Momentum 399TH features multiple sleeping areas, a fully equipped kitchen, and a comfortable living space with plenty of storage. Its open floor plan allows for easy movement, perfect for relaxing after a day of exploring. Built for adventure, this model includes a large garage area for your toys, bikes, or extra gear. Whether you’re heading to a weekend getaway or a cross-country journey, the Momentum 399TH combines durability and luxury to make every mile enjoyable. Travel with confidence thanks to Grand Design’s high-quality construction, including superior insulation and a robust chassis designed to handle long trips with ease. The RV is preowned but meticulously maintained, offering a like-new experience at a great value. From scenic mountain drives to coastal road trips, the 2022 Grand Design Momentum 399TH makes every journey memorable. With LazyDays powered by Campers Inn, you can trust a seamless buying experience and access to expert support for all your travel needs. Embrace the freedom of the open road. Make this 2022 Grand Design Momentum 399TH your ticket to adventure and start planning your next travel experience today.

Used 2023 Grand Design Momentum 399TH

$89,984.00
WALLER, TX

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Grand Design Momentum fifth wheel toy hauler 399TH highlights: Fold-Down Side Patio 13' Garage Bath and a Half Dual Entry Island with Bar Stools 60 Gallon Fuel Tank Get ready for a lot of fun when you head out to the off-road park, a special event, or a long trip with your toys! You will love the garage with the Fast Ramp rear ramp door, the Ram-Air garage vents on both sides, the 2,500 lb. rated flush-mount tie-downs and the protective diamond plate on the garage sidewalls. This area can become a bedroom or an extra living area if you want to add Happi-Jac rollover sofas/table with a top bed option, plus you will already have a half bath for convenience, an LED TV and storage for your gear. The living and kitchen area is spacious with dual slides and a kitchen island with bar stools, a free standing table and theatre seating or choose the super sofa option, and everything you need to feed everyone. The fold-down side patio offers an LED TV, storage and a great place to relax outdoors above ground. There are many more features to enjoy, and several options to customize your fifth wheel. The Momentum fifth wheel toy haulers by Grand Design are built for four seasons of travel with your off-road toys and include luxurious accommodations throughout for extreme living! Each is constructed to a superior standard with the thermal roof design, the full-laminated walls, and the triple insulated garage floor. The MORryde CRE3000 suspension system and rubber pin box, plus the upgraded axle hangers provide the performance and smooth towing you desire, while the interior offers luxury such as color changing LED accent lighting, raised panel hardwood cabinet doors with hidden hinges, and a central vacuum system. Each toy hauler also includes four packages, including the Garage Package with Tuff-Ply gas and oil resistant flooring, the Weather-Tek Package with a Stealth AC System, and the Interior Luxury Package with solid surface countertops!

Used 2024 Grand Design Momentum 410TH

$109,995.00
BRETZ RV & MARINE BILLINGS, MT
Billings, MT

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Grand Design Momentum fifth wheel toy hauler 410TH highlights: Front Private Bedroom Kitchen Island Private Toilet Dual Entry Doors Smart Sink Flip-Up Pet Dish in Garage There is much to love about this fifth wheel toy hauler! Starting with the 13' 6" garage that comes with an overhead bed, one of the dual entry doors, and an optional half bath to add. You might also choose to add the optional Happi-Jac rollover sofas and table with a top bed if need more sleeping space. The chef will love cooking in the kitchen with an island and a Smart Sink that includes a removable cutting board, produce strainer and glass rinser. The rest of the group can socialize together at either the free standing dinette or at the chaise lounge with pull-out sofa across from the entertainment center with an LED TV and fireplace. This model also includes a full bath with a private toilet and two sliding doors so you can close off this room completely if you wish. It enters directly into the front private bedroom where there is a queen bed slide to lay your head on at night, a front wardrobe prepped to add an optional washer and dryer, and a slide top dresser with TV above it! The Momentum fifth wheel toy haulers by Grand Design are built for four seasons of travel with your off-road toys and include luxurious accommodations throughout for extreme living! Each is constructed to a superior standard with the thermal roof design, the full-laminated walls, and the triple insulated garage floor. The MORryde CRE3000 suspension system and rubber pin box, plus the upgraded axle hangers provide the performance and smooth towing you desire, while the interior offers luxury such as color changing LED accent lighting, raised panel hardwood cabinet doors with hidden hinges, and a central vacuum system. Each toy hauler also includes four packages, including the Garage Package with Tuff-Ply gas and oil resistant flooring, the Weather-Tek Package with a Stealth AC System, and the Interior Luxury Package with solid surface countertops!

New 2026 Grand Design Momentum 414M

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CAMPERS INN RV MERRIMACK, NH
Merrimack, NH

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Grand Design Momentum 414M toy hauler fifth wheel highlights: Queen Bed Slide Out U-Shaped Kitchen Counter Free-Standing Dinette Kitchen Pantry 14' Separate Garage Flip-Up Pet Dish Any time spent in this spacious toy hauler will be time well spent! The 14' garage includes a Liftsuite system, an overhead loft bed and a flip-up pet dish for your furry friends. Once you enter in the main living area, you can relax on the L-shaped sofa with recline across from the fireplace, and there is a free-standing dinette if you want to play a game or two. The chef of your group will love the generous counter space in the kitchen, and the dual entry bath will let everyone stay clean throughout your trip! Head to the front master bedroom to enjoy the queen bed slide out with an optional king bed, a slide top dresser with TV prep, plus a large front closet, complete with washer and dryer prep! The Momentum fifth wheel toy haulers by Grand Design are built for four seasons of travel with your off-road toys and include luxurious accommodations throughout for extreme living! Each is constructed to a superior standard with the fully enclosed and heated underbelly and storage area, the 5-sided aluminum cage, and the triple insulated garage floor. The MORryde CRE3000 suspension system and rubber pin box, plus the upgraded axle hangers provide the performance and smooth towing you desire, while the interior offers luxury such as color changing LED accent lighting, hardwood cabinet doors with hidden hinges, and a central vacuum system. Each toy hauler also includes four packages, including the Garage Package with Tuff-Ply gas and oil-resistant flooring, the Weather-Tek Package with a Stealth AC System, and the Interior Luxury Package with solid surface countertops! STOCK IMAGES MAY BE SHOWN. COLORS & SPECS MAY VARY.

New 2026 Grand Design Momentum 414M

$129,997.00
TAMPA, FL

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The 2026 Grand Design Momentum 414M is a flagship luxury toy hauler fifth wheel built for maximum space, residential comfort, and serious hauling capability, making it one of the largest and most feature-packed models in the Momentum lineup. At approximately 46’4” in length with a dry weight around 18,500 lbs and a GVWR of 23,500 lbs, it’s designed for full-time RVers, large families, or outdoor enthusiasts who want a true combination of garage utility and high-end living space. Inside, the 414M is centered around a 14-foot separate garage, giving you dedicated space for ATVs, motorcycles, golf carts, or additional storage. This garage isn’t just for hauling—it converts into a secondary living area with drop-down beds, seating, loft space, and even a half bath, making it ideal for guests or multi-family travel. The main living area offers a wide-open residential layout with triple slide-outs, creating a large central gathering space. Theater seating or reclining sofas face an entertainment center with a fireplace, while large windows bring in natural light and make the space feel even more expansive when set up at camp. The kitchen is one of the standout features of the 414M, designed for full-time usability with a U-shaped or extended countertop layout, bar seating, pantry storage, and a 20 cu. ft. residential refrigerator. Combined with a 3-burner cooktop, oven, and microwave, it provides everything needed for long trips without sacrificing cooking space or storage. Up front, the private master suite includes a queen bed slide (king optional), large wardrobe storage, and washer/dryer prep, giving it a true residential bedroom feel. The main bathroom features a large walk-in shower with seating, vanity, and porcelain toilet, while the garage half bath adds extra convenience—especially for families or guests. Built on Grand Design’s premium Momentum platform, the 414M includes 101” wide-body construction, triple axles with independent suspension, a fully enclosed and heated underbelly, and high R-value insulation (R-45 floor, R-40 roof), making it suitable for extended-season and even cold-weather camping. Exterior features typically include three power awnings, a 6-point hydraulic leveling system, fuel station, and large pass-through storage, ensuring both comfort and capability on the road. Reasons to Buy the 2026 Momentum 414M Massive 14’ separate garage with convertible living space Bath-and-a-half layout for added convenience One of the largest Momentum models (~46’4”) Spacious residential living area with triple slides High-end kitchen with 20 cu. ft. refrigerator and large prep space Sleeps up to 6–7 people comfortably Loft + garage sleeping adds flexibility Triple-axle independent suspension for smoother towing Heated and enclosed underbelly for extended-season camping Ideal for full-time RV living, large families, or toy hauler enthusiasts Why Buy from Lazydays RV Powered by Campers Inn RV Large inventory of Grand Design Momentum luxury toy haulers Competitive financing options for qualified buyers Factory-trained RV technicians and nationwide service network Trade-in assistance for easy upgrades Full walkthrough and delivery orientation included Trusted national dealership group with long-term support

New 2026 Grand Design Momentum 414M

$129,997.00
TAMPA, FL

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The 2026 Grand Design Momentum 414M is a flagship luxury toy hauler fifth wheel built for maximum space, residential comfort, and serious hauling capability, making it one of the largest and most feature-packed models in the Momentum lineup. At approximately 46’4” in length with a dry weight around 18,500 lbs and a GVWR of 23,500 lbs, it’s designed for full-time RVers, large families, or outdoor enthusiasts who want a true combination of garage utility and high-end living space. Inside, the 414M is centered around a 14-foot separate garage, giving you dedicated space for ATVs, motorcycles, golf carts, or additional storage. This garage isn’t just for hauling—it converts into a secondary living area with drop-down beds, seating, loft space, and even a half bath, making it ideal for guests or multi-family travel. The main living area offers a wide-open residential layout with triple slide-outs, creating a large central gathering space. Theater seating or reclining sofas face an entertainment center with a fireplace, while large windows bring in natural light and make the space feel even more expansive when set up at camp. The kitchen is one of the standout features of the 414M, designed for full-time usability with a U-shaped or extended countertop layout, bar seating, pantry storage, and a 20 cu. ft. residential refrigerator. Combined with a 3-burner cooktop, oven, and microwave, it provides everything needed for long trips without sacrificing cooking space or storage. Up front, the private master suite includes a queen bed slide (king optional), large wardrobe storage, and washer/dryer prep, giving it a true residential bedroom feel. The main bathroom features a large walk-in shower with seating, vanity, and porcelain toilet, while the garage half bath adds extra convenience—especially for families or guests. Built on Grand Design’s premium Momentum platform, the 414M includes 101” wide-body construction, triple axles with independent suspension, a fully enclosed and heated underbelly, and high R-value insulation (R-45 floor, R-40 roof), making it suitable for extended-season and even cold-weather camping. Exterior features typically include three power awnings, a 6-point hydraulic leveling system, fuel station, and large pass-through storage, ensuring both comfort and capability on the road. Reasons to Buy the 2026 Momentum 414M Massive 14’ separate garage with convertible living space Bath-and-a-half layout for added convenience One of the largest Momentum models (~46’4”) Spacious residential living area with triple slides High-end kitchen with 20 cu. ft. refrigerator and large prep space Sleeps up to 6–7 people comfortably Loft + garage sleeping adds flexibility Triple-axle independent suspension for smoother towing Heated and enclosed underbelly for extended-season camping Ideal for full-time RV living, large families, or toy hauler enthusiasts Why Buy from Lazydays RV Powered by Campers Inn RV Large inventory of Grand Design Momentum luxury toy haulers Competitive financing options for qualified buyers Factory-trained RV technicians and nationwide service network Trade-in assistance for easy upgrades Full walkthrough and delivery orientation included Trusted national dealership group with long-term support

New 2026 Grand Design Momentum 414M

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CAMPERS INN RV OCALA, FL
Ocala, FL

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Grand Design Momentum 414M toy hauler fifth wheel highlights: Queen Bed Slide Out U-Shaped Kitchen Counter Free-Standing Dinette Kitchen Pantry 14' Separate Garage Flip-Up Pet Dish Any time spent in this spacious toy hauler will be time well spent! The 14' garage includes a Liftsuite system, an overhead loft bed and a flip-up pet dish for your furry friends. Once you enter in the main living area, you can relax on the L-shaped sofa with recline across from the fireplace, and there is a free-standing dinette if you want to play a game or two. The chef of your group will love the generous counter space in the kitchen, and the dual entry bath will let everyone stay clean throughout your trip! Head to the front master bedroom to enjoy the queen bed slide out with an optional king bed, a slide top dresser with TV prep, plus a large front closet, complete with washer and dryer prep! The Momentum fifth wheel toy haulers by Grand Design are built for four seasons of travel with your off-road toys and include luxurious accommodations throughout for extreme living! Each is constructed to a superior standard with the fully enclosed and heated underbelly and storage area, the 5-sided aluminum cage, and the triple insulated garage floor. The MORryde CRE3000 suspension system and rubber pin box, plus the upgraded axle hangers provide the performance and smooth towing you desire, while the interior offers luxury such as color changing LED accent lighting, hardwood cabinet doors with hidden hinges, and a central vacuum system. Each toy hauler also includes four packages, including the Garage Package with Tuff-Ply gas and oil-resistant flooring, the Weather-Tek Package with a Stealth AC System, and the Interior Luxury Package with solid surface countertops!

New and used Grand Design RVs for sale

Used 2021 Grand Design Momentum 399TH

$89,995.00

New 2024 Grand Design Momentum 399TH

$89,997.00

Used 2022 Grand Design Momentum 399TH

$99,995.00

Used 2022 Grand Design Momentum 399TH

$69,998.00

Used 2023 Grand Design Momentum 399TH

$89,984.00

Used 2024 Grand Design Momentum 410TH

$109,995.00

New 2026 Grand Design Momentum 414M

Call for price

New 2026 Grand Design Momentum 414M

$129,997.00

New 2026 Grand Design Momentum 414M

$129,997.00

New 2026 Grand Design Momentum 414M

Call for price

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