I can buy you any game from russian steam store. Just message me.
Here's a bit of a list that I made up:
0.5 key = 1 ToD

Region Free:

7 Days to Die = 6 keys
Age of Empires III: Complete Collection = 4.5 keys
BattleBlock Theater = 3 keys
Beasts of Prey = 5 keys
Call of Duty® 4: Modern Warfare® = 5 keys
Contagion = 4 keys
Counter-Strike: Global Offensive = 4.5 keys
Counter-Strike Complete = 4.5 keys
DayZ = 14 keys
Dead Island: Riptide = 2 keys
Dead Island: Game of the Year Edition = 2 keys
Dead Rising 3 = 10 keys
Democracy 3 = 3 keys
Don't Starve = 2 keys
Gunpoint = 2 keys
Hotline Miami = 1 key
Insurgency = 3.5 keys
Lichdom: Battlemage = 8 keys
Left 4 Dead 2 = 4 keys
Sid Meier's Civilization V = 2 keys
Sins of a Solar Empire: Rebellion = 3 keys
Strike Vector = 2 keys
Rust = 6 keys
Terraria = 2 keys
Valve Complete Pack = 15 keys
The Witcher: Enhanced Edition Director's Cut = 1 key
The Witcher 2: Assassins of Kings Enhanced Edition = 2 keys
Unreal Tournament: Game of the Year Edition = 1.5 keys
...
it's not the complete list.

Feel free to ask whether the game is region locked or not and how much do I want for it. I accept only keys.