Firstly I wouldn't blame ebay / sounds to me that if it wasn't on eBay then no one would have helped you dodge the bullet, which in this case it sounds like they potentially have! It's a good advert for them if so. As for the buyer, do you know them on here? If they got the info from here then they must be TZ member also? As for the money involved, scammers work on turnover doing multiple scams at any one time so the relatively low monetary value isn't a factor really.
In summary it could be
A) ebay over vigilant and have got it wrong
B) the guy is a scammer
C) the guy is legit but oblivious that his ebay account has been hacked (possibly a tz account been hacked too?)
End of the day no harm no foul and no financial loss. Relisting and move on would be my advice.
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