Play Money(?)
I posted a link some time back to the PlayMoney blog. This is a blog written by a guy who is a trader in UltimtaOnline. He trades virtual items and sells them for both real and play money.

I regularly follow his blog and his most recent article is about a tower he bought and is reselling on e-bay. He opened it at $1, and it is currently at $122.50. He bought the account for $250 and has sold off coal armor for 112.50 and regents for and unknown price. So, it looks like he'll end up coming out ahead.