@sickteddy just so you know you would have to buy a new account anyway, which is essentially buying the game again before you would be able to play, and buying a new account gives you a steam key anyway. So beware.
is it a key that allows you to create a new account and play or is it a key that just adds the game to steam, but still makes you purchase an account to log in?
Did you plan on telling whoever you traded, that they would not be able to play it without paying for a new game account which would give them a key anyway? or is that why you created this new steam account just a couple months ago? Because essentially unless you tell them that you are trading them a worthless key before they trade then your scamming them, you do at least know that right?
look at the title