New and used 399 Seismic by Jayco RVs for sale

New 2026 Jayco Seismic 399

$99,995.00
CAMPERS INN RV CHARLESTON, SC
Moncks Corner, SC

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The Jayco Seismic 399 is a luxurious and adventure-ready fifth wheel toy hauler built for extended stays and rugged play, while offering residential-style comfort. Here’s a full breakdown of its highlights, features, and why it stands out in the luxury toy hauler segment: Top Highlights of the Jayco Seismic 399 Party Deck (Rear Ramp Patio):The rear ramp converts into an elevated patio deck with a railing system and awning, perfect for entertaining or relaxing outdoors. Queen Bed with Convertible Sofas in Garage:The 13' 6" garage includes a power queen bed lift system with dual sofas below that convert into opposing beds or a dinette. Overhead Garage Loft with Storage:Great for kids or extra guests, this sleeping loft adds another spot for overnight stays, along with added overhead storage. Walk-In Shower:Spacious residential-style shower with glass doors—adds to the home-like feel of the bathroom. 60" x 80" Queen Bed in Master Suite:Positioned in a third slide-out, the bed leaves room to walk around and expands the bedroom living space. 4K Smart LED HDTV:A top-tier entertainment experience, paired with Jayco's Soundstream Bluetooth system and optional exterior TV setups. Interior Comfort and Design Dual Opposing Slides in Living Room: L-Shaped Tri-Fold Sofa Slide with Dinette, Refrigerator, and Pantry Front Private Bedroom Features: Full walk-in closet across the front cap Dresser and Washer/Dryer prep Dual-entry access to bathroom Dedicated wardrobe slide for extra space Kitchen Amenities Include: Solid-surface countertops Stainless steel appliances Ample overhead cabinetry Residential refrigerator options Construction & Utility Excellence 102" Wide-Body Frame – More usable interior space Custom Automotive-Grade Exterior Graphics Painted Fiberglass Front Cap with LED accent lighting Slam-Latch Pass-Through Storage Doors 30-Gal Fuel Station with Timer for toys Three Seasons Garage Wall:Keeps the garage comfortable in any season Climate Shield Package: Fully enclosed & heated underbelly 35,000 BTU furnace PEX plumbing for freeze resistance Zero-degree tested for all-weather Ideal For: Large families or groups bringing toys (UTVs, dirt bikes, kayaks) Full-time or extended RVers wanting home-style amenities Those seeking a multi-season, luxurious toy hauler with serious durability and party potential.

New 2026 Jayco Seismic 399

$108,995.00
FRETZ RV OF SOUDERTON, PA
Souderton, PA

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New 2026 JAYCO SEISMIC 399 Toy Hauler Fifth Wheel for sale at Fretz RV of Philadelphia Jayco Seismic toy hauler 399 highlights: Party Deck Queen Bed with Convertible Sofas Overhead Garage Loft with Storage Walk-in Shower 60" x 80" Queen Bed 4K Smart LED HDTV Fretz RV of Philadelphia is your premier RV dealership for new and used RVs! We proudly carry 2023, 2024, 2025, and 2026 models from top brands like Winnebago Minnie, Micro, M-Series, Access, Thrive, Voyage, FLX, Flex, plus Jayco Jay Flight, Eagle, Jay Feather, Air, North Point, Pinnacle, Bungalow, Seismic, and SLX. We’re also your go-to dealer for OPUS Campers (OP4, OP2, OP15, OPLite, Air Off Road), TAXA Outdoors (Habitat, Overland, Cricket, Tiger Moth, Mantis), and Ember RV (e-Series, Touring) Serving Philadelphia, York, Harrisburg, Lancaster, Allentown, New Jersey, Delaware, New York, and Maryland — Fretz RV has one of the largest selections of new, used, and Certified Pre-Owned RVs around! We proudly sell brands like Forest River, Salem, Wildwood, NuCamp (TAB, TAG), Cherokee, Coleman, R-Pod, A-Liner, Dutchmen, Keystone, KZ, Grand Design, Passport, Lance, Solitude, Coachmen, Catalina, Cougar, Sunset Trail, Raptor, Vengeance, Gulf Stream, and Airstream — all priced below NADA book value. With over 79 years of experience, we’ve built a trusted reputation in the RV industry as a Winnebago Dealer Partner for over 30 years and a Jayco Dealer Partner for over 40 years. Why Choose Fretz RV? Huge indoor showroom (12,000+ sq. ft.) 30,000 sq. ft. Indoor Service Facility RV Parts & Accessories Superstore Full-Service RVIA Certified Repair Shop Easy RV Financing Instant RV Insurance Quotes (Geico, Progressive, Brown & Brown) Extended RV Warranties (Compass, American Guardian XtraRide) RV Rentals Available Huge presence at the Hershey RV Show every year Detailed RV walkthrough videos on RVTrader, RVT, eBay, RVUSA, YouTube 5-star reviews on Google and DealerRater Visit us at:Fretz RV3479 Bethlehem Pike, Souderton, PA 18964Call Us Today: (215) 723-3121 Follow us on Facebook, Instagram, TikTok, YouTube, and Twitter/X for updates, RV tours, and the latest deals. Your adventure starts here. Whether you're shopping for new, used, or Certified Pre-Owned campers, trust Fretz RV — your full-service RV dealership in Pennsylvania! #RV #GoRVing #CampingLife #UsedRVs #NewRVs #Philadelphia #PennsylvaniaRVDealer #RVDealer #FretzRV #Jayco #Winnebago #EmberRV #OPUSCamper #TAXAOutdoors #RVLife

New 2026 Jayco Seismic 399

$110,995.00
ALEXANDRIA
Alexandria, LA

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Jayco Seismic toy hauler 399 highlights: Party Deck Queen Bed with Convertible Sofas Overhead Garage Loft with Storage Walk-in Shower 60" x 80" Queen Bed 4K Smart LED HDTV Get ready for outdoor adventures in this spacious toy hauler. Your guests will have the 13' 6" garage with queen bed with convertible sofa and a loft for added sleeping space, plus there is overhead storage for your things and a side man door to come and go easily. The main living area includes dual opposing slides with an L-shaped tri-fold sofa along the roadside and your dinette and refrigerator plus pantry in the curbside slide. Head up the steps to your front private bedroom with the dual entry bath accessible from the hall and inside the master bedroom. Here you will all enjoy a walk-in shower, toilet, and vanity with a sink, plus overhead storage. The bedroom features a third slide out housing a queen bed for added floor space, plus a full front walk-in closet, a dresser, and washer/dryer prep! One look at the Seismic toy haulers by Jayco, and you'll never go back! Each model features a custom automotive-grade vinyl exterior graphics package, a painted fiberglass front cap with built-in LED lighting, and 102" wide-body structural steel I-beam construction. You'll find the pass-through storage with Slam-Latch baggage doors will make unpacking easier than ever, and the rear ramp door/patio with anti-slip, non-skid flooring will allow you to unload your toys with no trouble at all. These toy haulers feature a three seasons garage wall/doors, a 30 gallon fuel tank with a timer, and exterior marine-grade speakers to keep the party going. The Climate Shield zero degree tested weather protection includes a 35,000 BTU furnace, PEX plumbing, and a fully enclosed and heated underbelly so you can enjoy your adventures year around. And we haven't even touched on the interior luxuries you'll find, like solid hardwood cabinet doors, residential vinyl flooring made in the USA, night shades, and more!

New 2026 Jayco Seismic 399

$108,995.00
CHICHESTER, NH
Chichester, NH

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Jayco Seismic toy hauler 399 highlights: Party Deck Queen Bed with Convertible Sofas Overhead Garage Loft with Storage Walk-in Shower 60" x 80" Queen Bed 4K Smart LED HDTV Get ready for outdoor adventures in this spacious toy hauler. Your guests will have the 13' 6" garage with queen bed with convertible sofa and a loft for added sleeping space, plus there is overhead storage for your things and a side man door to come and go easily. The main living area includes dual opposing slides with an L-shaped tri-fold sofa along the roadside and your dinette and refrigerator plus pantry in the curbside slide. Head up the steps to your front private bedroom with the dual entry bath accessible from the hall and inside the master bedroom. Here you will all enjoy a walk-in shower, toilet, and vanity with a sink, plus overhead storage. The bedroom features a third slide out housing a queen bed for added floor space, plus a full front walk-in closet, a dresser, and washer/dryer prep! One look at the Seismic toy haulers by Jayco, and you'll never go back! Each model features a custom automotive-grade vinyl exterior graphics package, a painted fiberglass front cap with built-in LED lighting, and 102" wide-body structural steel I-beam construction. You'll find the pass-through storage with Slam-Latch baggage doors will make unpacking easier than ever, and the rear ramp door/patio with anti-slip, non-skid flooring will allow you to unload your toys with no trouble at all. These toy haulers feature a three seasons garage wall/doors, a 30 gallon fuel tank with a timer, and exterior marine-grade speakers to keep the party going. The Climate Shield zero degree tested weather protection includes a 35,000 BTU furnace, PEX plumbing, and a fully enclosed and heated underbelly so you can enjoy your adventures year around. And we haven't even touched on the interior luxuries you'll find, like solid hardwood cabinet doors, residential vinyl flooring made in the USA, night shades, and more! 2025 Model Year Info and Specs Shown. Please ask for exact details on this RV.

New 2026 Jayco Seismic 399

$108,995.00
MONROE
Monroe, LA

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Jayco Seismic toy hauler 399 highlights: Party Deck Queen Bed with Convertible Sofas Overhead Garage Loft with Storage Walk-in Shower 60" x 80" Queen Bed 4K Smart LED HDTV Get ready for outdoor adventures in this spacious toy hauler. Your guests will have the 13' 6" garage with queen bed with convertible sofa and a loft for added sleeping space, plus there is overhead storage for your things and a side man door to come and go easily. The main living area includes dual opposing slides with an L-shaped tri-fold sofa along the roadside and your dinette and refrigerator plus pantry in the curbside slide. Head up the steps to your front private bedroom with the dual entry bath accessible from the hall and inside the master bedroom. Here you will all enjoy a walk-in shower, toilet, and vanity with a sink, plus overhead storage. The bedroom features a third slide out housing a queen bed for added floor space, plus a full front walk-in closet, a dresser, and washer/dryer prep! One look at the Seismic toy haulers by Jayco, and you'll never go back! Each model features a custom automotive-grade vinyl exterior graphics package, a painted fiberglass front cap with built-in LED lighting, and 102" wide-body structural steel I-beam construction. You'll find the pass-through storage with Slam-Latch baggage doors will make unpacking easier than ever, and the rear ramp door/patio with anti-slip, non-skid flooring will allow you to unload your toys with no trouble at all. These toy haulers feature a three seasons garage wall/doors, a 30 gallon fuel tank with a timer, and exterior marine-grade speakers to keep the party going. The Climate Shield zero degree tested weather protection includes a 35,000 BTU furnace, PEX plumbing, and a fully enclosed and heated underbelly so you can enjoy your adventures year around. And we haven't even touched on the interior luxuries you'll find, like solid hardwood cabinet doors, residential vinyl flooring made in the USA, night shades, and more!

New 2026 Jayco Seismic 399

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LITTLE DEALER OF PHOENIX, AZ
Phoenix, AZ

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Jayco Seismic toy hauler 399 highlights: Party Deck Queen Bed with Convertible Sofas Overhead Garage Loft with Storage Walk-in Shower 60" x 80" Queen Bed 4K Smart LED HDTV Get ready for outdoor adventures in this spacious toy hauler. Your guests will have the 13' 6" garage with queen bed with convertible sofa and a loft for added sleeping space, plus there is overhead storage for your things and a side man door to come and go easily. The main living area includes dual opposing slides with an L-shaped tri-fold sofa along the roadside and your dinette and refrigerator plus pantry in the curbside slide. Head up the steps to your front private bedroom with the dual entry bath accessible from the hall and inside the master bedroom. Here you will all enjoy a walk-in shower, toilet, and vanity with a sink, plus overhead storage. The bedroom features a third slide out housing a queen bed for added floor space, plus a full front walk-in closet, a dresser, and washer/dryer prep! One look at the Seismic toy haulers by Jayco, and you'll never go back! Each model features a custom automotive-grade vinyl exterior graphics package, a painted fiberglass front cap with built-in LED lighting, and 102" wide-body structural steel I-beam construction. You'll find the pass-through storage with Slam-Latch baggage doors will make unpacking easier than ever, and the rear ramp door/patio with anti-slip, non-skid flooring will allow you to unload your toys with no trouble at all. These toy haulers feature a three seasons garage wall/doors, a 30 gallon fuel tank with a timer, and exterior marine-grade speakers to keep the party going. The Climate Shield zero degree tested weather protection includes a 35,000 BTU furnace, PEX plumbing, and a fully enclosed and heated underbelly so you can enjoy your adventures year around. And we haven't even touched on the interior luxuries you'll find, like solid hardwood cabinet doors, residential vinyl flooring made in the USA, night shades, and more! *All calculated monthly payments are an estimate for qualified buyers only and do not constitute a commitment that financing or a specific interest rate or term is available. Financing terms may not be available in all Campers Inn Company locations. Campers Inn RV Sales is not responsible for any misprints, typos, or errors found in our website pages. Any price listed excludes freight, sales tax, registration tags, and delivery fees. Manufacturer pictures, specifications, and features may be used in place of actual inventory in stock on our lot. Please contact us for availability as our inventory changes rapidly. Manufacturer and/or stock photographs may be used and may not be representative of the particular unit being viewed. Where an image has a stock image indicator, please confirm specific unit details with your dealer representative.

New 2026 Jayco Seismic 399

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PHOENIX, AZ
Phoenix, AZ

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Jayco Seismic toy hauler 399 highlights: Party Deck Queen Bed with Convertible Sofas Overhead Garage Loft with Storage Walk-in Shower 60" x 80" Queen Bed 4K Smart LED HDTV Get ready for outdoor adventures in this spacious toy hauler. Your guests will have the 13' 6" garage with queen bed with convertible sofa and a loft for added sleeping space, plus there is overhead storage for your things and a side man door to come and go easily. The main living area includes dual opposing slides with an L-shaped tri-fold sofa along the roadside and your dinette and refrigerator plus pantry in the curbside slide. Head up the steps to your front private bedroom with the dual entry bath accessible from the hall and inside the master bedroom. Here you will all enjoy a walk-in shower, toilet, and vanity with a sink, plus overhead storage. The bedroom features a third slide out housing a queen bed for added floor space, plus a full front walk-in closet, a dresser, and washer/dryer prep! One look at the Seismic toy haulers by Jayco, and you'll never go back! Each model features a custom automotive-grade vinyl exterior graphics package, a painted fiberglass front cap with built-in LED lighting, and 102" wide-body structural steel I-beam construction. You'll find the pass-through storage with Slam-Latch baggage doors will make unpacking easier than ever, and the rear ramp door/patio with anti-slip, non-skid flooring will allow you to unload your toys with no trouble at all. These toy haulers feature a three seasons garage wall/doors, a 30 gallon fuel tank with a timer, and exterior marine-grade speakers to keep the party going. The Climate Shield zero degree tested weather protection includes a 35,000 BTU furnace, PEX plumbing, and a fully enclosed and heated underbelly so you can enjoy your adventures year around. And we haven't even touched on the interior luxuries you'll find, like solid hardwood cabinet doors, residential vinyl flooring made in the USA, night shades, and more! *All calculated monthly payments are an estimate for qualified buyers only and do not constitute a commitment that financing or a specific interest rate or term is available. Financing terms may not be available in all Campers Inn Company locations. Campers Inn RV Sales is not responsible for any misprints, typos, or errors found in our website pages. Any price listed excludes freight, sales tax, registration tags, and delivery fees. Manufacturer pictures, specifications, and features may be used in place of actual inventory in stock on our lot. Please contact us for availability as our inventory changes rapidly. Manufacturer and/or stock photographs may be used and may not be representative of the particular unit being viewed. Where an image has a stock image indicator, please confirm specific unit details with your dealer representative.

New 2026 Jayco Seismic 399

$109,988.00
FUNTOWN RV Corsicana, TX Superstore
Corsicana, TX

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Jayco Seismic toy hauler 399 highlights: Party Deck Queen Bed with Convertible Sofas Overhead Garage Loft with Storage Walk-in Shower 60" x 80" Queen Bed 4K Smart LED HDTV Get ready for outdoor adventures in this spacious toy hauler. Your guests will have the 13' 6" garage with queen bed with convertible sofa and a loft for added sleeping space, plus there is overhead storage for your things and a side man door to come and go easily. The main living area includes dual opposing slides with an L-shaped tri-fold sofa along the roadside and your dinette and refrigerator plus pantry in the curbside slide. Head up the steps to your front private bedroom with the dual entry bath accessible from the hall and inside the master bedroom. Here you will all enjoy a walk-in shower, toilet, and vanity with a sink, plus overhead storage. The bedroom features a third slide out housing a queen bed for added floor space, plus a full front walk-in closet, a dresser, and washer/dryer prep! One look at the Seismic toy haulers by Jayco, and you'll never go back! Each model features a custom automotive-grade vinyl exterior graphics package, a painted fiberglass front cap with built-in LED lighting, and 102" wide-body structural steel I-beam construction. You'll find the pass-through storage with Slam-Latch baggage doors will make unpacking easier than ever, and the rear ramp door/patio with anti-slip, non-skid flooring will allow you to unload your toys with no trouble at all. These toy haulers feature a three seasons garage wall/doors, a 30 gallon fuel tank with a timer, and exterior marine-grade speakers to keep the party going. The Climate Shield zero degree tested weather protection includes a 35,000 BTU furnace, PEX plumbing, and a fully enclosed and heated underbelly so you can enjoy your adventures year around. And we haven't even touched on the interior luxuries you'll find, like solid hardwood cabinet doors, residential vinyl flooring made in the USA, night shades, and more!

New 2026 Jayco Seismic 399

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CAMPERS INN RV LEESBURG, FL
Fruitland Park, FL

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Jayco Seismic 399 – Power, Luxury, and Space for Every Adventure The Jayco Seismic 399 toy hauler delivers exceptional versatility, comfort, and durability, making it ideal for adventure seekers who want to bring their gear and enjoy residential-level amenities on the road. Key Highlights 13' 6" Garage with queen bed, convertible sofas, loft storage, and side entry door Party Deck with anti-slip ramp for outdoor entertainment Front Private Bedroom with walk-in closet, dresser, washer/dryer prep, and queen bed slide Dual Entry Bath with walk-in shower and ample storage Spacious Living Area with opposing slides, L-shaped tri-fold sofa, dinette, and pantry 4K Smart LED HDTV for premium entertainment The garage transforms easily from hauling space to a comfortable guest suite with a queen bed system and loft. The main living area offers abundant seating and storage, while the front bedroom provides expanded comfort with its own slide-out, generous closet space, and washer/dryer prep. Built with Jayco’s signature quality, the Seismic series features 102-inch wide-body construction, steel I-beam frame, custom exterior graphics, and a painted fiberglass front cap with LED lighting. Climate Shield protection, a 35,000 BTU furnace, fully enclosed heated underbelly, and durable PEX plumbing allow you to travel year-round. A 30-gallon fuel tank, three seasons garage wall, and marine-grade exterior speakers ensure you're ready for any adventure. Why Buy from Campers Inn RV of Leesburg? Large selection of Jayco toy haulers with competitive pricing Knowledgeable staff committed to helping you find the right RV Certified technicians and a full-service department you can trust Comprehensive walkthroughs and customer education before delivery Family-owned dealership group known for integrity and long-term support

New 2026 Jayco Seismic 399

$96,987.00
A&L RV SALES GREENVILLE, NC
Chocowinity, NC

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Jayco Seismic toy hauler 399 highlights: Party Deck Queen Bed with Convertible Sofas Overhead Garage Loft with Storage Walk-in Shower 60" x 80" Queen Bed 4K Smart LED HDTV Get ready for outdoor adventures in this spacious toy hauler. Your guests will have the 13' 6" garage with queen bed with convertible sofa and a loft for added sleeping space, plus there is overhead storage for your things and a side man door to come and go easily. The main living area includes dual opposing slides with an L-shaped tri-fold sofa along the roadside and your dinette and refrigerator plus pantry in the curbside slide. Head up the steps to your front private bedroom with the dual entry bath accessible from the hall and inside the master bedroom. Here you will all enjoy a walk-in shower, toilet, and vanity with a sink, plus overhead storage. The bedroom features a third slide out housing a queen bed for added floor space, plus a full front walk-in closet, a dresser, and washer/dryer prep! One look at the Seismic toy haulers by Jayco, and you'll never go back! Each model features a custom automotive-grade vinyl exterior graphics package, a painted fiberglass front cap with built-in LED lighting, and 102" wide-body structural steel I-beam construction. You'll find the pass-through storage with Slam-Latch baggage doors will make unpacking easier than ever, and the rear ramp door/patio with anti-slip, non-skid flooring will allow you to unload your toys with no trouble at all. These toy haulers feature a three seasons garage wall/doors, a 30 gallon fuel tank with a timer, and exterior marine-grade speakers to keep the party going. The Climate Shield zero degree tested weather protection includes a 35,000 BTU furnace, PEX plumbing, and a fully enclosed and heated underbelly so you can enjoy your adventures year around. And we haven't even touched on the interior luxuries you'll find, like solid hardwood cabinet doors, residential vinyl flooring made in the USA, night shades, and more!

New and used 399 Seismic by Jayco RVs for sale

New 2026 Jayco Seismic 399

$99,995.00

New 2026 Jayco Seismic 399

$108,995.00

New 2026 Jayco Seismic 399

$110,995.00

New 2026 Jayco Seismic 399

$108,995.00

New 2026 Jayco Seismic 399

$108,995.00

New 2026 Jayco Seismic 399

Call for price

New 2026 Jayco Seismic 399

Call for price

New 2026 Jayco Seismic 399

$109,988.00

New 2026 Jayco Seismic 399

Call for price

New 2026 Jayco Seismic 399

$96,987.00

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