I agree about rv's on a trailer vs. driven. Just going by what the dealer told me because I asked if I went down to Florida from WNY to pick up a rig we were interested in would I get a better deal, no was the answer plus the trailer part.
Aware of the new if not titled threshold, which many lending institutions use, but there has to be some limit to miles before a dealer has to sell something used. Otherwise they could keep dealer plates on a nice MH, put 50k miles on it and still pawn it off as "new", I don't think so.