[Selling]Arma2, Arma 2 OA keys (DayZ)

As the title says, I'm selling arma 2 and arma 2 operation arrowhead CD keys. Note that they are not meant to be activated on steam. I currently have 13 in stock and I will gladly go first with a legit and trusted buyer.
I'm asking 8$ per key, and I'll lower the price if you decide to buy more than 3 at a time.