Bidder bids very high at first, causing the second bidder's bid to increase to the second bidder's Max. Manipulator then retracts the bids. Manipulator then rebids at a small increment above the legitimate high bidder. Many, multiple bids from one bidder or a few bidders, on one item. Number of bids shown on front of item is very high, but the price has moved little, if at all.
Bidders usually have little or no feedback.
If it is an alias, the bidder's information will be falsified. Bidding on items at auction without completing the transaction, thus blocking legitimate bidders, to the detriment of sellers Bidding without paying for the items bid on in a chronic, habitual manner Determined through feedback records and current complaints. Warning, but eBay reserves the right to suspend. Persisting to bid on a seller's items, despite a warning from the seller that bids are not welcome. Sellers have every right to reject the bids of a bidder.