I got a free copy of HL2 sitting in my steam gifts that I wouldn't mind getting rid of for a game of equal or lesser value. Pretty much if you have a game in ure gifts and you don't own HL2 then I might be willing to trade if I haven't played the game you're offering or it isn't completely a crap game. lol
Post here if you're interested in this trade (Most people have HL2 so I'm not expecting much, just seeing if anyone is interested in taking this copy off my hands for another cheap game that I haven't played :P).