I picked up a 20th reunion caberet (19" home use, no coin door/etc). I picked it up for about $300ish.... it wouldn't respond to controls.
turned out to be years ago when the problem happened, the board ended up set to require credits.... and obviously there was no way to put credits on the thing

. I reset the config and it works, minus the caps I still need to replace.
Only problem with mine is someone loaded it on its side and put a nasty scratch down the ms Pac artwork on the left side. I'd love to find art for that side, as other than that it is in really nice condition.