The story is better than you think... the auction actually won for $1 USD, and the pickup was local and thus free (ok, minus the gas but it was only like 30 min away).
When I got it home and was cleaning it up, I found another quarter lodged in the coin acceptor! Hence, $0.75
Best find I'VE had on Ebay...
I saw no need to hookup the counter, I just use the ones readily available via MAME Game Information for each rom.