Used doesn't always mean problems. Sometimes, it can mean that any bugs have been taken care of. All depends on age and previous owner.
Our camper was less than a year old and a trade-in. I happened to meet the guy who used to own it at the dealership while he was picking up his new, bigger camper. I found out he had had no issues and never had to bring it in for warranty work. Other than a few minor, easily remedied things, I have had nothing go wrong with the camper.
As I read here in this forum, the majority of complaints are for the same things that are common to all brands and are not manufacture specific.
I would have liked to have an Airstream. Still do. And I would, if I could talk my more sensible better half into it.
Good luck and have fun searching.