Well, depending on how much you spend on the usb drive, it'll be a bit over $150. If you've already got an XBox, then it's a no-brainer for you to try that out. If you DON'T have one yet, for $219 you can get:
Duron 1.6GHz
256MB DDR RAM
40GB EIDE HDD
32MB AGP Video
48X CD-ROM Drive
http://pcinfinity.net/Merchant2/merc...gory_Code=SPEC
That's just a brief run down. Check it out.
They don't charge shipping either. There is a small "insurance fee" though. It's usually like a couple bucks.