6 listings from 5 dealers nationwide. Prices range from $65,299 to $70,999. Median price is $68,499.
The 2026 Keystone 373rd is currently available from 5 dealers on Searchshop with 6 active listings. Prices range from $65,299 to $70,999. Median price is $68,499. The 2026 373rd is the newest model year currently listed, so expect lower mileage but higher asking prices than older years.
Asking prices are tightly clustered, suggesting a stable resale market — there is little room to negotiate based on comparables alone.
Inventory is concentrated across New York, Kansas, Missouri, so buyers in those regions will find the most local options.
Confirm the original factory warranty is intact and transferable, request the original window sticker, and verify any recall work has been completed at a Keystone dealer.
