Recently a "repair shop" down south of Boston was "liquidated" when the owner stopped paying on his lease, and all of the games (including some that were apparently in for repair) showed up on craigslist...
When I saw the IR listed, I threw in a bid to track it, and looked at the other auctions, and the list of boards looked familiar, so I pulled up the guy's old website off archive.org and verfied they were all boards in his stock. About 7-8 years ago (before I'd started doing repairs for others) a friend had this guy work on his IR, but to my knowledge he never got it back... I emailed him, a couple days back, and he verified that he never got his board back...
...so chances are, this board is double-hot... stolen from my friend by the repair guy, then stolen from the repair guy by the property owner, then sold to a third party, and is now being ebay'ed....
Without a clear picture of the SN on the board, and matching it up to the SN on his game, and a little more concrete info to support this narrative, I don't think it'd be possible to convince ebay it's stolen, so they'd pull it...