2026 Jayco Seismic 399, Toy Hauler Fifth Wheel, New 2026 Jayco Seismic 399 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?