The first TT I bought was from a dealer. I did not have it inspected but after a couple of months I wish that I did. We found that the L/F corner of the roof had been leaking for quite a while. We ended up peeling back the roof and removing the water soaked rotten roof area. It was a big job, thankfully the walls weren't rotten. The dealer said "sorry", it was sold As-Is. The next TT I bought was brand new.
I think buying used is okay but you've got to have it inspected by someone that knows what they are looking for. Water leaks is the biggest issue on any trailer, even one that is only a couple of years old.
