Cards for cash

All this heat. I came home from a really easy day of work with a feeling of absolute exhaustion. All I can think of doing is play some more games until my room finally cools off enough for me to go to bed. Steam have this new 'Trading Card' feature thing that lets you collect cards for points OR you can sell them for personal funds. I'm literally playing Steam for cash at the moment, I gotta strike before the economy becomes over-saturated with too many cards! I've already made 40p!