Any key you want can go for 1 card (possibly two games for one card it depends).
However, the gift games at the top are off limits unless you have a LOT of cards on ya. Roughly valuing HL2 cards as 3-4 to 1 TF2 key to give you an idea why I'm saying that in advance.
I am offering redeemable steam keys for cards, emoticons and backgrounds in my main topic, detailed information can be found in the [Card Section] if interested, have a wonderful day.
Pretty much just wanting to see offers of any kind