2 listings from 2 dealers nationwide. Prices range from $141,199 to $141,899. Median price is $141,199.
The 2026 Grand Design 399m is currently available from 2 dealers on Searchshop with 2 active listings. Prices range from $141,199 to $141,899. Median price is $141,199. The 2026 Grand Design 399m is nearly new, so most examples will still carry meaningful factory or extended warranty coverage.
Asking prices are tightly clustered, suggesting a stable resale market — there is little room to negotiate based on comparables alone.
Inventory is concentrated across Indiana, Arizona, 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 Grand Design dealer.
This page has fewer than 3 listings and is currently set to noindex while inventory builds.
