System I built last month for $500
Ultra Dual Channel 1024MB PC3200 DDR 400MHz- $99
Ultra PC Vent II w/ 2 45mm Fans System Exhaust BK -$9.99
18" Translucent Blue 7 Pin Serial ATA Drive Cable -$4.99
Ultra 12" Round IDE 2 Device Cable Blue UV -$6.99
Kingwin Big Air BA-12 CPU Cooler for AMD K8 -$39.99
Hitachi 320GB Serial ATA HD 7200/16MB/SATA-3G -$89.99
Lite-On 20X DVDRW Super-Multi Lightscribe LH20A1H -$49.99
Mach Speed MSNV-939 Socket 939 Motherboard -$63.84
AMD Athlon 64 X2 3800+ Socket 939 CPU -$116.15
Then you can add around $100 plus or minus a few bones for a video card. I got it all at Http://www.TigerDirect.com. It’s a solid setup in my honest opinion and I really enjoy using it.