Do you do the Goozex? I was pretty active for a long time and it's probably time I went through my backlog and traded off a few more games on the service.
This month, Goozex is running a special promotion for PS3 users with a bunch of things going on. First, trades for PS3 titles won't cost tokens, the dollar that you give Goozex for facilitating a trade. And the most frequent traders of PS3 titles in June will get a free PS3 game. Plus, listing specified PS3 titles for trade will enter you into drawings for Amazon gift cards.
If you haven't tried Goozex yet, I recommend the service. If you go and sign up at the website using the coupon code “PS3Player” you'll get a token and a hundred Goozex points to get you started. Neat stuff. Time to get trading.