You click on the number of bids WTD and that shows certain information about the bidder, such as how much feedback they have and what percentage of their bids have been with that seller. In bid shilling, a seller sets up a fake account, or gets a friend to bid. They then bid up to get a buyer to up their bids, or in bid sheilding they bid up until they find out how much the buyers maximum bid is, then they withdraw their bid, leaving the second highest bidder as the winner. As I said, it doesn't look like it happened in this case as no bids were withdrawn.