Good advice PB. I (almost) learned that lesson the hard way. Went to check out an identical unit (a year older than the one I'm looking at), in Lincoln NE a month or so ago. During the walkaround I found some spongy areas on the floor near the queen bed, drivers side. Sales rep looked 'surprised' until I asked him, 'so, what else is wrong with unit?'. He then went on the defensive and said I was rude for even asking that question. I then went on the offensive and stormed into the service manager's office with all my 'concerns'. And, the rest is history. $$ remained in my pocket, not in the dealer's.