I've definitely seen people quickly sell machines because they thought they wanted one, bought a highly regarded one, then realized some combination of the following:
a) the machine is too difficult and/or fast
b) the rules/scoring is not intuitive
c) Family does not like playing it and/or the theme
d) maintaining a pinball machine is way more complicated than they imagined
I've ran into casual pinball fans that would prefer a restored EM over a more modern machine because of those reasons.
On the other side you have collectors that want either want to trade to experience more pins, or they're chasing the high of the latest new thing and are too impatient for code improvements. I don't blame them if they can get equal value back, or only lose a couple hundred bucks for their couple hundred games of play.
