Like CheapyD posted, CAG being an option kind of throws the whole poll out of whack.
You put this poll for best Game Trading Website on the GameTZ forums where GameTZ forumgoers are voting, and GameTZ would win. Put this poll on the Goozex forums where Goozex forumgoers are voting, and Goozex would win. Likewise, this poll with CAG as an option on the CAG forums is going to result in a CAG win to nobody's surprise.
That being said, I voted for Kodos.