I once demanded cancellation of a purchase I made on Ebay because the seller informed me that the S&H had been increased by $5 in order to aid a member of his "Church" who needed money and was carrying the stuff to the post office. The seller informed me that I had to accept those terms because the price was stated in the auction. I told him being forced to subsidize a "Church" was not part of the Ebay agreement, and he backed down finally after making some ungratious remarks about MY "professionalism"
Oh, and "snipers" keep the prices LOWER. If there is nobody showing their hand until the final 10 seconds of an auction, there is no opportunity for another buyer to outbid you.