I don't know what it is ... maybe the moon is out of cycle ... for those who are unaccustomed to me being a voice of reason, speaking for the not-so-cheap, I apologize ... or not.
One of the things that happens A LOT when you have been in this hobby for a while is that retailers, and the prices that they charge, come up and cheap folks like you and I tear into them.
I don't know Dale (the seller), nor have I ever bought from him.
I do know my local retailer, who is much bigger than Dale (they bought Sony out) and has similar, if not worse (actually, WAY WORSE), pricing.
FWIW, from that same retailer, with their insane pricing, I picked up a working Rygar boardset (with JAMMA adaptor) for $20. I have picked up at least a dozen trackballs for less than $5 each and then recycled them to NOS condition, including several gifts to local scholastic programs. I have also picked up some nonworking boardsets for a completely reasonable price. Add to that a bunch of stock purchases on NIB stock that rival the deals offered here.
If I start ticking off machines, then I find that I have 9 machines, in various states, that I obtained from this supplier (who is "worse" than Dale). I would be surprised if there were many folks who could match the deals that I made for those machines, even with the retail pricing.
Next closest provider of games to casa Cheffo is 3 machines whom I got from a guy who would, in a thread like this, be labelled a dirty opportunist for the fact that his prices are far higher than we would accept here. At the last auction, where I clearly didn't have a vehicle suitable for the purchase that I made (it was a mostly-working Cheyenne ... was I supposed to leave it there ?), the only guy who lent (actually GAVE) me a strap to close the van door was that guy who people ---smurfette--- about. B1 -- you ARE the man!
It's easy to tear Dale apart for his pricing and to think that the $475K is a "real" price for his business. OK, so it's easy ... but give your head a shake.
And, FWIW, $9500 for a MM is high for hobbyists, but isn't entirely unreasonable for retail (Mr Pinball price is what, $7500 or so ... don't have the new guide, but I expect it is within $250).