New and used 399TH Momentum by Grand Design RVs for sale

Used 2019 Grand Design Momentum 399TH

$62,950.00
GADSDEN
Attalla, AL

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Grand Design Momentum 399TH toy hauler highlights: Dual Entry Kitchen Island Exterior LED TV Dual Enclosed Fuel Station Spray Port If you are ready to play with your off-road toys, hitch up this Momentum 399TH fifth wheel toy hauler after loading your toys in the 13' garage. You will be able to get cleaned up after getting muddy from the trails in the half bath in the garage or the full bathroom next to the bedroom. The kids can sit on the bar stools at the kitchen island, or relax on the dinette and theater seats while watching the 49" LED TV and fireplace. There are several options to choose from, and many more features to enjoy such as the dual entry doors, fold-down side patio with LED TV, and exteriorunobstructed pass-through storage, plus more! With any Momentum toy hauler fifth wheel you will enjoy extraordinary living with extreme playtime with the Weather-Tek insulation for four seasons of protection, and a fully enclosed fuel pump station to keep the fun going the whole time. The Tuff-Ply garage flooring is gas and oil resistant, plus triple insulated. You will find 2,500 lb. rated flush-mount tie-downs to keep your toys secure while moving down the road. The interior includes a sofa with headrest and removable swivel table, a convection microwave, a central vacuum system with tools and a dust pan, and a satellite/solar roof access channel to mention a few highlights. Any Grand Design Momentum allows you to keep your active lifestyle no matter where you decide to stay!

Used 2021 Grand Design Momentum 399TH

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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.

Used 2023 Grand Design Momentum 399TH

$89,984.00
SAN ANTONIO, 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!

New 2024 Grand Design Momentum 399TH

$96,977.00
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 2023 Grand Design Momentum 399TH

$86,995.00
TAMPA, FL

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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 2022 Grand Design Momentum 399TH

$84,990.00
CAMPERS INN RV MERRIMACK, NH
Merrimack, NH

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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 Experience luxury, power, and adventure all in one with this Used 2022 Grand Design Momentum 399TH, a top-tier fifth wheel toy hauler designed for RVers who want it all—space, comfort, and the ability to bring their toys along for the ride. Built with Grand Design’s renowned quality and attention to detail, the Momentum 399TH is perfect for extended stays, full-time RV living, or epic weekend getaways. Luxury Meets Rugged Capability The Grand Design Momentum 399TH stands out with its bold exterior and durable construction, built to handle long miles and rugged destinations. This luxury toy hauler offers an expansive garage that easily accommodates motorcycles, ATVs, or other adventure gear, while doubling as a versatile living or sleeping area when the toys are unloaded. Inside, you’re welcomed by a spacious, residential-style interior featuring high-end finishes, modern décor, and smart floorplan design. The open-concept living area offers plush seating, a large entertainment center, and plenty of natural light, creating a comfortable space to relax after a day of adventure. Designed for Comfort on the Road The Momentum 399TH is packed with premium features that make every trip feel like home. The gourmet kitchen includes solid-surface countertops, ample cabinet storage, a residential refrigerator, and quality appliances that make cooking easy whether you’re boondocking or staying at a full-hookup campground. The master suite offers a true retreat, complete with a comfortable bed, generous wardrobe storage, and a private bathroom designed with residential touches. Multiple sleeping areas ensure there’s room for family and friends, making this toy hauler ideal for group travel. Built for Extended Adventures With its robust insulation, climate control systems, and large holding tanks, this 2022 Grand Design Momentum 399TH is well-suited for extended stays and four-season travel. Whether you’re chasing warm weather, tailgating, or exploring off-the-grid destinations, this fifth wheel is engineered to keep you comfortable wherever the road takes you. Why Buy a Used 2022 Grand Design Momentum 399TH? Buying used allows you to enjoy premium luxury and performance at a more affordable price point. The 2022 Momentum 399TH delivers proven reliability, high-end craftsmanship, and features that continue to rival new models—making it a smart investment for adventurous RVers who want luxury without compromise. Why Buy from Campers Inn RV? When you purchase from Campers Inn RV, you’re not just buying an RV—you’re joining a family. As one of the nation’s most trusted RV dealerships, Campers Inn RV is committed to delivering exceptional customer service before, during, and long after the sale. Every used RV is carefully inspected to ensure quality and peace of mind. Campers Inn RV also offers flexible financing options, knowledgeable RV professionals, and a nationwide support network, making ownership simple and stress-free. With decades of experience and a customer-first approach, Campers Inn RV helps you find the perfect RV to match your lifestyle and travel goals. Start Your Next Adventure Today If you’re looking for a luxury fifth wheel toy hauler that blends adventure-ready capability with residential comfort, the Used 2022 Grand Design Momentum 399TH is ready to deliver. Visit Campers Inn RV today and discover why this Momentum is the perfect partner for your next journey.

Used 2022 Grand Design Momentum 399TH

$69,998.00
TAMPA, FL

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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 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. And 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. And if you would prefer to have a residential refrigerator, you should check out model 399TH-R! 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, the triple insulated garage floor in most toy haulers, the insulated gooseneck and the Rail-Tite underbelly seat. 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, a sofa with headrest and removable swivel tables which include heat, massage and LED lighting package, and a central vacuum system with tools and dust pan. Start your extreme playtime now with a Momentum!

New and used 399TH Momentum by Grand Design RVs for sale

Used 2019 Grand Design Momentum 399TH

$62,950.00

Used 2021 Grand Design Momentum 399TH

Call for price

Used 2023 Grand Design Momentum 399TH

$89,984.00

New 2024 Grand Design Momentum 399TH

$96,977.00

Used 2023 Grand Design Momentum 399TH

$86,995.00

Used 2022 Grand Design Momentum 399TH

$84,990.00

Used 2022 Grand Design Momentum 399TH

$69,998.00

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