J D Power RV values question

When I sold our 5er I looked at JDPower for their estimated value. Then I googled my year and model for other sites such as rvtrader.com and national listings by individuals and dealers. Keeping in mind that the latter were asking prices and not necessarily the actual sell price, those prices ranged from less than the JDP estimate to near the same to higher than JDP to some that were simply beyond belief higher. Ruling out the latter and guessing many if not most sold for something less than the listed price, I would say JDP is at least a good starting place, maybe listing it a little higher to start. You can always lower your price if it doesn’t sell.