I'm gonna bend the rules a little bit, but I bet you 99/100 poeple here didn't buy all retail. I happen to have a.txt with all my expenses so you're in luck. All these are rounded up 5 and include shipping btw. Everything is retail unless otherwise noted.
200 - WD 80gb 7200rpm, 75 MIR (fry's)
160 - OEM (1yr warranty) XP 1700 (place off pricewatch)
115 - Radeon 7500 (for sale/trade)
90 - Lite-On 24x (newegg)
75 - ECS K7VTA3 (pricewatch)
70 - Antec, 10 MIR (fry's)
60 - used ram (for sale/trade)
35 - fans/heatsink (Micro Center)
30 - Midiland 6peice speaker system (fry's)
9 - Network Card(for sale/trade)
10 - HDD cooler (fry's)
10 - usb 4 port hub, 5 MIR (fry's)
6 - tool set (Micro Center)
2 - keyboard (fry's)
-----------------------
872-90MIR = 782 total (I made some corrections and didn't calculate, may be a little off)
I know you said barebones and cheap, but hey why not throw in the rest of the system... I'm sure you guys'll get over it.
edit>> sp