Well, if the guy genuinely believes it to be authentic, the notoriety achieved by putting it on eBay would be priceless. I’d assume he expected it to be pulled.
If it’s a scam, he has multiple copies and was going to sell a whole batch of ‘em, lol.
Actually, the humor is “priceless” LOL...
President Obama’s birth certificate sold to highest bidder on eBay...
[ buyer... “Obama” doncha know... :-) ...]