Ok, so I know you can look up used values for RV's on nada.com nada.com lists high and low retail values though. So anyone know how to determine a way to come up with a fair price for a private party purchase? I'll be starting to shop for an RV this fall, and I really have no idea how to determine if it's a good price since all NADA lists is retail values for RV's. Is there a general rule of them, like a certain percentage below retail value, or a certain dollar amount below retail value? Come you RV experts, give me some pointers so I don't get screwed!