I don't know the definitely of a "vintage" PUP, but I purchased a 1994 1006 about 3 months ago. I figure at almost 20 years of age, that it might be approaching "classic" in a few years? Ha!
It's needed quite a few things done to it (new brake lines/MC flush, new fridge, had an electrical grounding issue...), but it's definitely not a redo (tenting and lift are good and no wood rot/frame rust).
1994 Jayco 1004 (w/3" Torflex Lift)
2001 Nissan Pathfinder (4WD w/6" Lift)