These are not Steam keys, you need to have the game(s) downloaded already to use them.
You will not be able to launch Arma2:OA with Steam either when using the keys. You'll need to use DayZ commander/SixLauncher.
I'm unsure of how much these keys are actually worth, show me proof if you think they're too high and I might lower them.
Stock:
Arma2:OA [21] -> $2/each
CoD4 [13] -> $5/each
General info:
You go first.
Discount when buying in bulk ( 5+ ).
Tutorial on how to use the keys, support, and shit like that follows when buying.
I will replace dead keys
IF you can provide sufficient proof that they are actually dead.
Contacting me through Steam is preferred.
Contact:
Steam
MSN ( on my profile )
PM
Note: Again, I prefer Steam
First buyer gets 1 free Arma2:OA key.