We had a 2014 Vista 35b for five years. Bought it new. I was very pleased with the build quality. Had no real need for warranty work. The fiberglass roof is good to have but definitely check the seams that run the full length both sides where roof attaches to sidewall channel to make sure sealed properly. Winnie spells out in manual the required maintenance there and you’ll want to ensure previous owner hasn’t ignored that. If the coach has been maintained properly, and tires have been replaced as noted by previous poster since originals would be approaching 10 years, these are really nice units imo. They also handle well for a gasser. My previous mh was a 2007 Winnie gasser with 19.5” tires and the 35b with the 22s handled infinitely better.