Watch out for e-bay seller 7216karl.
I was bidding on a jacobs chuck, no bids after 6 days until mine, then within an hour 3 more bids from the same person, who had apparantly bought the exact same item from the same seller 2 weeks before.
I sent him an e-mail about shill bidding and surprise surprise, the auction was immediately cancelled and is now re-listed, ebay #7630977780 . His shill bidding aliases appear to be fudgenudger1 and richparnell0, who between them have successfuly upped the price on his previous items. In fact they both appear to have bought this very same drill chuck several times:)
Peter