They're not steam redeemable.
I can guarantee that they won't be used by me or anyone else once a trade has been made. (I am the original owner. Used to play CoD:WaW here and there, got bored. FC2 I haven't actually even touched multiplayer mode.)
I've also got the latest stalker game, duke nukem, brothers in arms, and a couple other top notch games if anyone is interested. Honest, I don't play online games much these days so I'm not sure which of those, if any, have online capability, but ask if interested. Might have some that are steam redeemable.