i have been able to purchase other gift cards (like amazon kindle cards) at best buy in the past using best buy gift cards. the system allows it, now whether your local best buy has the amazon gift cards in stock and whether the cashier is going to try and turn you down is a different story.
if your best buy doesn't have any amazon GC's, check for ebay GC's and then you can use the ebay GC to buy a gamestop GC on ebay. then you will be able to buy an amazon GC at gamestop. not to mention that you will earn $3 in ebay bucks and 1,650 gamestop PUR points.
if your best buy doesn't have any amazon GC's, check for ebay GC's and then you can use the ebay GC to buy a gamestop GC on ebay. then you will be able to buy an amazon GC at gamestop. not to mention that you will earn $3 in ebay bucks and 1,650 gamestop PUR points.