For general feedback about the game.Steam Support
Visit the support site for any issues you may be having with the game or Steam.
As part of our ongoing efforts to gradually phase out all Earth money in favor of Team Fortress hats, we're kicking off the TF2-only beta of our new Steam Community Market! The Market should improve trading in every way: People looking for specific items will be able to locate them faster, folks looking to sell items will find the process a lot more efficient, and best of all, we've made it easier for everybody to translate playing TF2 into buying games on Steam.
While the Market is in beta, we're limiting trading, buying and selling to one-time consumable items while we're ironing out the kinks. Also, items you buy will be subject to transaction fees; read more about it in the FAQ.
If you'd like to learn more about the Community Market—or even more importantly, give us the feedback we need to make it better—be sure to visit the Steam Community Market group.