HP Desktop AMD 3500+/939, 1GB, 250GB, DVDRW, XP MCE, PCI-E $469

[imported_dani]

This could be the start of a pretty good gaming system. Add a 7900GT or a 256MB X1800XT for $299 and your good to go.

http://www.ecost.com/ecost/shop/detail~DPNo~623040.asp

 

[mb]

That's a pretty good deal considering there's no rebates on it. I got my sister a refurb'd HP desktop from ecost a few months back.. spent a little more for a slightly lesser machine than this, but it fits her needs perfectly. HP seems to do a good job with refurbishing their computers because I could not find one fault with it, other than a few superficial scratces on the case.
Don't forget you can save an additional 2.1% (roughly $10) by using Fatwallet.