Looking at your sig, I shouldn't even have to mention this, but: Goozex.
350 points. There's only 5 people actively ready for it and 4 trades going on right now. That's a pretty good turnabout time. See what I did there? (probably not since you haven't played it yet)
If you really want to pay cash for it, try CDTradepost for $17.99 + shipping
Thanks for the CD Tradepost recommendation; I was really asking because I'm starting up a little Game Club with a group of friends, and I need a few copies... I'm definitely getting mine through Goozex, though. ;-)