I don't have a cd key but I do have an active account I can sell to you. It has about 3 weeks of game time left on it. PM me if you're interested. I'd be willing to do $40 on it.
Well. There are actually many sites, when you can buy cd-keys for various games. Personally I use http://www.buy-play.com/ site and i am quite hmm...how to say it? Pleased.