Thanks everyone for the feedback. I still have a few days before I go see this one in person so I'll continue to read up on these in the meantime.
According to the owner this one has never had a leak but I doubt that. I plan on taking a really good look for mold and other issues.
https://winchester.craigslist.org/rvs/d/1990-toyota-rv/6450561255.html
Based on the pics everything looks decent and the price is good. What your thoughts?