Had my TF2 cards up at 0,35 all night and they didn't sell.
Lowered them to 0,30 and they sold within seconds.
All in all I made 9,50 since yesterday. I'm really bad at predicting the Steam markets, but I can only imagine the prices going down further once the TC release to everyone and more games start implementing them, so I thought it would be smart to cash out now. Right now there are mostly "hardcore" players in and thus the % of people who care about badges and EXP is high, once everyone can get cards I assume that would change.