We have bought three, always used, I did not have the money to buy new, same as our vehicles, have always bought used.
First one was the best, it was a 1986 18.5 foot prowler lynx we bought in 2005, then wife decided in 2009 it was not big enough and we also needed A/C, so bought a 1989 21.5 Coachman Catalina which was good, but ended up with some rot, but traded it in and our 1989 21.5 coachman in on a 2004 Wilderness lite 24.5 with A/C and one slide which was a great feature, in 2010, and it has done us well so far.