Since when can a person renegotiate a contract after he has agreed to it already? Regardless of the shipping charges it is CERTAINLY the bidders responsibility to pay for anything he agrees to buy,and also the BUYER'S responsibility to raise questions about shipping BEFORE placing a bid. I don't think that causing a problem for sellers who "may" be charging too much for shipping is the answer at all ,and casts a bad light on the buyer who put himself into this situation in the first place.