It's apparently only had one owner before the people I bought it off, and the original owner used it a couple of times yearly for camping trips with his family before deciding to sell it late last year.
The people I bought it off added in the heating/cooling unit when they purchased it, but only used it a handful of times with their kids. They realised it was slightly too small to fit all 4 of them in there comfortably, so now they're looking to upgrade to something bigger.
They said they've never had any issued towing it, and I couldn't see anything wrong with it when I checked it out today, but I guess I'll find out when I pick it up on Saturday if the weight on the back throws it off at all.