I have a few CoD keys laying around.
MW2 (1): $10
Ghosts (2): $25 each
Black Ops 2 (1): $20
Call of Duty 4 (1): $10
If you're interested, add me on Skype.
My Skype is JiggaMan611.
A heuristic from public signals — not a guarantee. Always read the vouches and use a middleman for large trades.