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In case you aren't aware, you can add the bundle to your library, get Portal as extra copy if you already own Portal 1, and then trade it for 1 key. This is what I did. Forget what I just said if you already were aware.
I want to trade Portal for the TF key you want. Before trading, please tell me which key do you want.
As title say. if you accept the offer please add me :)