I've been on a xbox 360 fansite, xboxlife.dk
You can sell games you dont want anymore, or sell some MS points, or some Live cards etc. And, fx, I bought 8000 MS points, and 1 year of xbox gold, after I sended him the cash he gave me the passwords etc.
The reason why I could trust him, is because they had a special page look's like this:
Commercial Ratings: 498 total, 498 good, 0 bad
Then I can press on that link, and read the comments tht people made, this guy have allmost 500 good, zero bad, so his 100% trustworthy.
I dunno, but this could be a much more simple way dealing with this
