There were quite a few models in that lineup.
I had a 20' or 21' Trail lite and compared it to the Roadtrek I owned here: http://www.classbforum.com/forums/f24/b-vs-b-720.html
Mike gave some good advice.
A $10,000 RV would be rare around here unless it's from the late '80's or maybe very early '90's.
On any Class C I open all the cupboards to inspect where the ceiling meets the wall to check for leaks.