As hummer010 said (2 posts earlier) this isn't a trading thread.
Here is the list of games available : games list
You can choose one of the games in the list and when you get it you add one game in the list.
edit: Here is an example of how to use this thread:
I take Hitman: Absolution and leave ARMA: Gold Edition in return.
I'd like to take "ARMA: Gold Edition" and I will leave "Nostradamus: The Last Prophecy" to the list.
ah! thx for the explanation, I read the first post but I think that I misunderstood :)