I would like to create an interactive trading site for Team Fortress 2 (game). It would work similar to the buying and selling of shares, with a 'market depth'. The site would also need to be linked to STEAM, which is an online gaming software program, there is a Steam SDK you can use etc. I can share more details if anyone is interested.
If you know about Trading shares, play team fortress 2, have Steam, or know how to use the Steam SDK, you will get preference.