Anyone know a good place to find a copy of Windows XP for cheap?

I’ve been using Linux for quite a while now, but I’d really like to play things like GGPO and I’m gonna get Starcraft 2 when it comes out, so I need to pick up Windows again and I don’t intend it to be Vista. I can’t find XP cheaper than $199 anywhere, you guys have any ideas?

a friend currently taking engineering classes

College bookstores usually sell them cheap if you go or know anyone who goes there. It cost $20 for a new copy of XP at my bookstore. :looney: