The best way to do the switch is to compare what you can get by selling it by your self and then purchase to what a trade can give you.
In the past I traded my 1999 5W Wonderer from Thor for a 2006 Cruiser(NEW) ,after a tough negotiation I was surprised how "little" I had to add.
Slickest set-up for you that I've seen was a fold down doorON the slide out for a bike to roll into livingroom.Don't remember brand but think it was custom as it had tripple axles and the Ford F350 had duel TANDEMS all 8 rear tires were driven,very cool!
Maybe an off question for this forum but here goes...........I have found an Dutchmen Victory Lane '05 model in very good shape that I can trade for a very reasonable amount. Anyone know anything about these units. I can't find any real complaints online except for the stock tires.