Check out the bidding history. Someone's clearly gone in early with their highest bid of $900 and someone else (possibly a friend of the seller) has plugged away at the bids until they're the highest bidder. 10 bidders, 55 bids, a day and a half in!
http://www.ebay.co.uk/itm/Used-Mens-Heuer-Autavia-Chronograph-Automatic-Wrist-Watch-Tachymeter-/281196509570?ssPageName=ADME:B:SS:GB:1120
I might make a screen shot of this to show to people who can't grasp why they shouldn't go in early with their highest bid.