Selling gymbucks is illegal.  It violates copyright law, trademark law, and its prohibited by ebay.  You can have your auction shut down and given a warning by ebay.  Also, Gymboree has recently been very aggressive about gymbucks, suing several ebay sellers.  There has also been discussion within the Gymboree corporation about prosecuting ebay sellers for theft.  YOU CAN NOT SELL//TRADE GYMBUCKS!!!  AND BUYER beware, Gymboree CAN trace the origination of gymbucks through the bar code on the back of the buck.  Don't do it...it's not worth it.