I see titles that are rated decent, frozen price wise for years. Then I see prices on machines that couldn't sell for under $1000 a year or so ago, with asking prices around $2500.
I've seen revenge from mars sell for 3600, then one or 2 others months later, in almost as good condition, sit at 2600.
I know for a fact that pinside archive has a whole lot of BS inflated sold prices or a ton of crap with no prices listed, which tells me that there's a bubble. Sure, some out there may pay retard price for a pin, but there's gonna be a ton of disappointment when time to resell.