Below is the list of all the games I am willing to trade for anything on my steam wishlist or a PS4 exclusive (Amazon wishlist), or sell for a cheap price. Since I'm a Steam collector, I can trade for any Steam games I do not already own. (Check Barter.vg)
The trades do not have to be one for one. For example: if you wish to offer me The Culling, I can exchange FTL, Mirror's Edge, and Battlefield 3 for it (if that seems fair to you). The higher the ranking of the game on my wishlist, the more games I'm willing to trade.
One last thing: If you trade or buy from me, I will most likely give you a few keys just because I want to get rid of them, especially if you have good reputation. That is, if you have a Steam account.
Since trading keys is not the most reliable thing on the internet, I do not mind giving you the game key first as long as you have good reputation. Once you confirm that it works, I expect you to hold your end of the bargain.
Here is the game list: