Steam keys

Sell:

CS GO: steam key
Borderlands goty: steam gift
Arma 3: steam key
Metro 2033: steam key
Battlefield 3: origin key
Serious Sam HD: The First Encounter: Steam Key
Serious Sam HD: The Second Encounter: Steam Key
Dead Space: Steam Key/Origin
Burnout Paradise:: The Ultimate Box Steam Key/Origin
Crysis 2 Maximum Edition: Steam Key/Origin
Medal of Honor: Steam Key/Origin
Mirror's Edge: Steam Key/Origin
Command & Conquer: Red Alert 3 - Uprising Steam Key/Origin

How much for the Metro and Crysis? Not sure I want them yet but wouldn't mind knowing the price.