This is a very common question within the RV industry, not just Dynamax. The chassis of a motorized product is purchased from a chassis manufacturer (Ford, Chevy, Workhorse, Freightliner, Spartan, etc.) as an "Incomplete Vehicle" (with an established chassis serial number). When Dynamax completes the vehicle, we assign a model year and a Dynamax serial number to the coach portion. The RV industry and chassis manufacturer model years change at different times. For example, Dynamax may introduce the 2002 model year unit in June of 2001, but the chassis manufacturer doesn't introduce the 2002 chassis until September of 2001.
Because Dynamax "Completes the Vehicle" and assigns the model year, the value of any Dynamax unit is determined by the model year of the Forest River RV, not necessarily the chassis. This may vary by state.