eBay Bidding Abuses You Should Report
Some behavior isn't nice (no argument there), but it also may not be a violation of eBay rules — in which case, eBay can't do much about it. Here's a list of bidding abuses that eBay wants to know about:
Bid shielding: Two users working in tandem. User A, with the help of accomplices, intentionally bids an unreasonably high amount and then retracts the bid prior to the 12-hour cancellation deadline of the auction — leaving a lower bid (which the offender or an accomplice places) as the winning bid.
Bid siphoning: Users send e-mail to bidders of a current auction to offer the same merchandise for a lower price elsewhere.
Auction interference: Users warn other bidders through e-mail to stay clear of a seller during a current auction, presumably to decrease the number of bids and keep the prices low.
Bid manipulation (or invalid bid retraction): A user bids a ridiculously high amount, raising the next highest bidder to maximum bid. The manipulator then retracts the bid and rebids slightly over the previous high bidder's maximum.
Nonpaying bidder: People call them deadbeats; the bottom line is that these people win auctions but never pay up. Your bid on eBay is a legal contract to buy if you win — it is not a game.
Unwelcome bidder: A user bids on a specific seller's auction despite the seller's warning that he or she won't accept that user's bids (as in the case of not selling internationally and still receiving international bids). This practice is impolite and obnoxious. If you want to bar specific bidders from your auctions, you can exclude them.