More people entering the hobby with mostly the same number of machines (setting aside very expensive NIB machines). Combination of more demand and maybe more importantly less discerning demand. Early in the hobby it's pretty easy to under value your time fixing things and the cost of fixing things leading to over paying (or at least over paying relative to what someone who has more knowledge would be willing to pay). There's also some averaging down of the Pinside price estimates based on older transactions and what values used to be vs what someone is willing to pay today. I'm certainly a newcomer and have hopefully not grossly overpaid for my machines, but I definitely paid more for my $1,400 Judge Dredd than $1,400