Nah, I don't need any now bud, I maxed out my BL2 badge..I know D DOMIN8 would be interested. He was looking for some a while ago.
Add them as a friend, open up a chat window with them from the Friends menu after they've accepted and press the arrow in the top right (I think). From there you can select Invite to Trade and put the cards up for trading. EasyOk ill have to learn how to send them (i just started using steam 12/25/13)