I have, on two different occasions mailed my giftcards to them and on both occasions, received a message from them saying my cards could not be processed. They mailed them back and i sold them to another site and they accepted it without questions so what seems to be the problem with cardpool? I emailed them a number of times asking for a reason but no one's ever replied so please just avoid and go sell to plasticjungle or giftcards.com...