Cheap awesome computers

Some of my friends have custom built their computers; they are top of the line and supposedly one only had to pay $800.
Is this possible, and if so, where can I get more info?
Thanks in advance.

MSI K8N NEO4-F - $75
AMD Athlon 64 X2 4200+ - $360
Cooler Master Centurion 5 (CAV-TO3-UK) - $45
ASPIRE ATX-CW500WP4 ATX 500W PSU - $35 / $25 AR
PNY Geforce 7600GT (VCG7600GXPB, 256M) - $170 / $150 AR
Lite-On 16X DVD±R Burner - $35
Aopen Cobra AW850 5.1 Sound Card - $12
Patriot Signature DDR400 1GB (2x512M) - $80

Sub-total: $802 (772 AR)
   
Damn close to the target price, just throw in a HD for $30 (160G drives are constantly on sale for $30-40) and you are pretty much set. While it's not top of the line, it certainly isn't something to sniff at. You could even go lower if you scope out deals and buy the components over a month's time. Possibly shaving enough to up that 7600GT to a 7900GT for $65 more.