I have a 1978 Dodge 24 footer I purchased for $2500. Not the prettiest thing in the world, but with the big block 440 in it, it tows like a champ. Can't go wrong with the crushed velvet seats in the back and the shag carpet.
I'm about to pick up a 1989 Honey class A on the cheap! Like Chris said, not super pretty but they work and your not going to feel bad when you spill something or get it dirty. If your looking for a family thing its different and you might want a new one. I'm just using it for track duty so it only needs heat, AC, bathroom/shower and a bed
