Hey guys quick question is it safe to buy Arma 2 used providing the person selling doesn't go online at the same time with the same key? for example i bought COD 4 used. they key worked, but sometimes when i play online it wont let me join a game because it says something about my key already in use and i have to wait. i read on the net that if you bought it second hand its a sign of the person who owned it before still playing it with that key. thanks for any help.