I won an iPod Shuffle through a penny auction, and despite that it was supposed to be a black third-generation, I got sent a blue current-generation (I wouldn't complain about the upgrade). However I'm not a big fan of the blue color, though the finish is really nice. Which stores would likely let me exchange this blue iPod Shuffle for a silver iPod Shuffle without a receipt? Its really not a big deal for a store to exchange colors since they all have the exact same value. I wanted to try Best Buy, but I don't think they would do the exchange due to their fairly strict item scans. Ideas?