GMG is having a deal which you can get a mystery game (limit to just 1 per account) at just 6 cents (AU 8 cents, using 28 deg card).
People have replied that they got games such as American Truck Simulator and COD BlackOps. I've got Jack Zero, Bridge Constructor and Shattered Haven myself and surprisingly while my Steam account is having 1000+ games I've got none of those yet.
Might not be a great bargain but it's fun regardless; and for 8 cents it's not a big deal if you get a bad game.
I just got Steel Storm Burning Retribution - It's 14.99 USD on steam with Mixed reviews.
Would have preferred american truck simulator.