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2026 Jayco Seismic 399
NewStock #18W1099
Listing price
2026 Seismic 399
Other floor plans with a similar body style, feature mix, and price range, prioritizing other manufacturers and brands.
What sells people on the Jayco Seismic 399 is the combination of a serious garage and genuine living space, all wrapped into one 46-foot fifth wheel. The bath and a half is the quiet hero here, giving your crew a second toilet so the main bath stays free, and two entry doors keep foot traffic flowing between the garage and the front bedroom. It sleeps eight and carries a hefty payload, so the gear comes along without a fight. If you're shopping used, it's worth giving the plumbing, hydraulics, and finish work a close look before you buy.
Length
45 ft
Dry weight
14,950 lbs
GVWR
20,400 lbs
Sleeps
8
Many factors play into a unit's listing price and what you should pay. This guide provides a ballpark estimate, but it does not factor in your exact scenario or how different listings are equipped.
There may be room for price negotiation.
$79,995 – $112,995
This unit is ranked 32 of 56 by asking price in this group.
The listing price on this unit has changed 2 times.
See the complete price timeline and the rest of this unit's pricing insights.
Kunes RV
Suamico, WI
Sells faster than 85% of Wisconsin RV dealers
Compared with 37 dealers in Wisconsin
JAYCO SEISMIC TOY HAULER
(2026) These Typical Features Vary by Model
5-Star Handling, Customer Value Packages
Garage
Convertible Sofas with Folding Armrests
HappiJac Electric Lift Beds
Washer Dryer Prep
Garage Storage Loft
Three Seasons Garage Wall
Rubberized Tuff-Ply Flooring
Frame Mounted D-Rings
Ram Air and Power Roof Vents
Garage TV Prep
High Intensity LED Ramp Lights
Anti-Slip Patio Deck Ramp Door
Patio Deck Steps
Rear Patio Electric Awning
30-Gal Fuel Tank with Timer
Living Spaces
Two Power Patio Awnings with RGB LEDs
Awning Lighting Remote Control
MORryde Strut Fold-Away Main Step
Keyed-Alike Lock System
Residential Vinyl Flooring
LED Interior Lighting
Night Roller Shades
Designer Window Treatments
Entertainment Center
LED Fireplace Spaceheater (vbm)
Stain Resistant Fabrics
SuperSofa or Theater Seats, Heat Massage
Overhead Cabinets
Solid Hardwood Cabinet Doors
Hidden Hinges, Magnetic Door Catches
Dovetail Joinery Drawers
Full Extension HD Drawer Guides
Dining
Pantry
Stainless Steel Do It All Sink
Glass Rinse and Vegetable Rinse
Pull-Out Faucet
12v 17cf Refrigerator
3-Burner Cooktop and Oven
30-inch Space-Saver Microwave
Outdoor LP Quick Connect
Technology & Entertainment
Systems Center
LP and CO Detectors
12v Charging Station
Digital TV Antenna
4K Smart LED HDTV Digital HDMI
Touchscreen Bluetooth Stereo
Four Indoor Speakers
Outdoor Marine Grade Speakers
Sleeping
Stairway Hardwood Handrail
Olympic King Bed (359, 413)
Residential Mattress
Residential Quilted Bedspread
Underbed Storage Gas Struts
Bathroom
Skylight
Porcelain Foot Flush Toilet
Power Vent
Two 30# LP Bottles Automatic LP Regulator Overlander II Solar Package Two 200w Solar Roof Panels 30-Amp Solar Controller Battery Disconnect Switch 50-Amp Detachable Service Cord NPS Yamaha 6.0 Gas Generator (CARB) Built-in Pure Sine Inverter Inverter Pre-wire 35k Furnace HELIX Cooling System Three 13.5k Soft-Start AC Units Insulated AC Ducts, Directional Vents Enclosed Lighted Docking Station On-Demand Tankless Hot Water Winterization and Sanitation Hookups Black Tank Flush Quick Connect Outdoor Shower
Other listings for this floor plan, ranked by condition, model year, distance, price, and listing quality.
Coach Build
102-Inch Wide-Body
Rota-Flex King Pin
Structural Steel I-Beam
MORryde CRE-3000 Suspension System
Dexter Axles with ABS and Tow Assist
Bronze Bushings Wet Bolt Fasteners
EZ Lube Hubs
Nev-R-Adjust Brakes
Black Custom Machined Aluminum Wheels
17.5-inch 16-Ply H-Rated Tires
Undermount Spare
5/8-inch T&G Plywood Deck
Welded Aluminum Framing
StrongholdVBL Laminate
Gelcoat Fiberglass Exterior
Magnum Truss XL6 Roof System
3/8-inch Walk-on Roof Deck
Seamless Alpha Roof Membrane
Folding Roof Access Ladder
Painted Clear Coat Front Cap with LEDs
Automotive Grade Vinyl Graphics
Climate Shield Zero-Degree Tested
Radiant Barrier Roof Floor
Double Layer Batt Ceiling Floor
Enclosed Heated Underbelly
JaySMART LED Lighting
6-Point Hydraulic Auto-Leveling
Pass-Through Storage
Slam Latch Cargo Doors
