I would say that you need to do an even more comprehensive PDI inspection...I would look for any water intrusion, stains in ceiling or walls...Also softness in floors through out the camper...Excessive tire wear...
The camper you are looking at is a pre Thor camper and were pretty well built, but like all other campers they too had some issues...
If you are buying from a dealer I would try to find out what kind of reputation the dealer has...Good luck...