Not sure if he actually sold it, the page shows the listing "ended", and it doesn't show up when you search for "sold" items.
But there's a second dude with a new listing, auction starting at US$1000, buy it now at US$2500!
I think he's being a bit optimistic, to say the least.
"Optimistic" you say?Holy shit, this can't be right, the link below shows a Bat-Pod sold on eBay for $2500, with just 1 bid.
http://www.ebay.com/itm/LEGO-5004590-Bat-Pod-Ultra-Rare-Giveaway-Batman-DC-batpod-set-only-750-made-/271984935409?hash=item3f5390c1f1
Also shows 2 others show as sold at $999 and $2250.
http://www.ebay.com/sch/i.html?_from=R40&_sacat=0&_nkw=lego%205004590&LH_Complete=1&LH_Sold=1&rt=nc&_trksid=p2045573.m1684
Guess i'll be selling mine... really thankful to have won but I'd much rather have ~$1000-$2000. I'm assuming nobody here is that anxious to get their hands on it but you can have first dibs