Yeah, Don't fall for the "We have another just like it on our lot". When we bought ours the one at the show had alum wheels. When we went to pick it up had painted wheels.
They said they "forgot" about the one at the show having alum wheels. I also had to ask for all the extras that are supposed to be included (outside grill, awning, plug in fan/light, etc). None of it was in the camper. In fact I never got the plug in fan/light. They just kept telling me "we don't make anything on these pop-ups..." yeah right.
If you do, get them to make a photocopy of the invoice from the one at the show and tell them if everything is not on your camper you don't want it.