I haven't sat down and listed everything, nor figured out the damage. Lets see what we have:
SpacChem DLC
Crusader Kings 2 + DLC
Warlock: Master of the Arcane + DLC
Saints Row: The Third + DLC
Sanctum DLC
Trine 2
Binding of Isaac DLC
Alan Wake + DLC
Frozen Synapse DLC
Dead Island + DLC
The Witcher 2
Civilization V Gods and Kinds DLC + Korea DLC
Batman Bundle
Serious Sam 3
Total: $167.01.

Sweet baby Freeman. I'm officially cutting myself off, with the exception of Hard Reset. I've gotten everything I wanted, and my Steam backlog is so long now I'd need a year off just to catch up.