A 15 year old camper can be anywhere between pristine (always under a roof when not in use, not used extensively, well taken care of) and ... junk that is not worth restoring ( all the opposite of the before listed).
Six Pac were not famous for their superior quality. The are/were more of an entry level brand. There is nothing wrong with that.
Just beware. The price is any number that the camper is worth to you.
If you do not know what to look for, even serious water damage can be hard to spot, and even the seller is not necessarily aware of the state of his camper.
Read through some of the restauration topics in the truck camper university sticky.
