Helping you complete your sets! Trading TF2 Cards for your TF2 Cards for....TIPS! That's right! This used to be a totally free service (optional tip). Since the public release of the trading card beta there has been a major influx ungrateful, rude fuckasses!
How much is the tip? Dunno! You define that! It could be a TF2 weapon, card, emoticon, whatever!