It obviously depends on where you look, the quality of the dealer or private seller. We looked at a few private party coaches that were nasty in spite of the seller claiming they were pristine (photos don't always tell the truth). We saw some really nice clean coaches on dealers' lots. Both of our DP's were bought used from dealers and after searching their inventory on the internet and talking to them before going there. The coaches we planned to look at were clean when we saw them.
It just depends on many factors.