A bit of both, but mainly it seems to be people buying a/c that won't suit what they want to do with it, ie buying a TB10 for short bimbles, or a C150 for long distance touring!
There are many who have fallen into the trap of thinking that something cheap is a good buy............ And then finding some pretty nasty surprises. Gut reaction and a damn good survey are the absolute minimum requirements for a successful purchase! Not rushing in because it looks alright, but hasn't had the spar mod done and nobody checked to see if it was necessary when looking at that type.