I've seen the exact same jpg scam recently on various higher end equipment. For a while it seemed to have died down but now it is back in full force (or maybe I just stopped perusing ebay for a while). Usually it's a short, 1-5 day bid period, and outside payment, by a seller of otherwise non-photo stuff. Don't do it, you get no protection and will lose.
On the buyer's side, the past several camera things I've bought on ebay were definitely not as described, lenses having fungus, etc., and the only way to get fair treatment is to demand a refund, regardless of seller's return policy. An M5 was described as near mint, turned out to have lots of haze, corroded battery well, and will need CLA; when I filed refund request, seller (with "great" reviews) immediately and without hesitation offered discount, knowing full well of his lies. A Zeiss 25mm ZM claimed as excellent had a bad focusing heliocoid, which seller argued was inconsequential; had to force a refund. Even lenses from Japan described as clean are not so. Lots of crap on ebay and buyer be very beware. I've decided to stick to real stores with high reputations and good return and warranty policies.