Well, the Square Head was Borden's, and there's no way to tell what the best offer was.
There was also a Wms Pinch Hitter from Fab Fantasies that sold for 4500 back in Feb. and a Shortstop Baseball also from FF that sold for 4500 last week. These were BIN listings, so not sure they'd be shills. His Super Par Golf had a best offer accepted against the asking price of 3400. So I dunno, those ones seem plausible, but aren't pinball machines.
The Grand Slam baseball was from a retail shop, so hard to say. Baseball games can run higher than pins.
The Hi-Flyer I'd have a hard time believing. Listing goes back to Dec. 02, 2013 and finally sold a couple days ago?
Pro Football from the same seller, ended same day. Rocket III, also same seller, same day. Unlikely.
Dancing Lady - hmm, seems possibly real. Can't really tell much from the listing. The game was nice though.
The Soccer was from a retail place, so it's possible. They list a lot of games.
That Volley was from the Bene Pizza guy in Omaha. His been able to snag some high BIN prices on games before. Then there are Volley's that sit unsold for 500-700 in just as nice condition. That's the magic of ebay; catch just the right buyer at just the right time. There have also been some overseas buyers willing to pay the money for nice condition examples, that domestic buyers wouldn't dream of paying. Someone who's willing to crate and deal with shipping can then get the 3x the money.
Diamond Jack seems legit (pricey, but legit).
So maybe a mixed bag of real and not so real.