Here is a quick list I put together at newegg. (and it includes a video card)
Cases (Computer Cases, ATX Form)
Rosewill Gold/Black ATX Mid Tower Case with 400W Power Supply, Model "SL313-2634WU+P27" -RETAIL
Specifications:
Special Features: FRONT NEON LIGHT (INSIDE) more info>
N82E16811147002 $35.00
CD/DVD Burners (RW Drives)
Rosewill 52x32x52x16 CD-RW & DVD Combo Drive, Model C523216, Retail
Packaging: Retail box Bundled with PowerDVD Ahead NeroExpress burn ROM
N82E16827190002 $39.99
Hard Drives
Western Digital Special Edition 80GB 7200RPM IDE Hard Drive, Model WD800JB, OEM Drive Only
Specifications:
Capacity: 80GB
N82E16822144122 $64.00
Memory (System Memory)
A-DATA 184 Pin 512MB DDR PC-3200 - OEM
N82E16820211119 $78.00
Monitors - CRT
CTX VL951T 19" CRT Monitor -RETAIL
Specifications:
CRT Type: Invar Shadow Mask FST
Dot Pitch: 0.26mm Diagonal(0.22mm Horizontal)
Max / Optimal resolution: 1600 x 1200 @ 75Hz / 1280 x 1024 @ 85Hz
N82E16824103171 $122.00
Motherboards - AMD
ASUS "A7N8X-E Deluxe" nForce2 Ultra 400 Chipset Motherboard for AMD Socket A CPU -RETAIL
Specifications:
Chipset: NVIDIA nForce2 Ultra 400 + MCP-T
FSB: 400/333/266/200MHz
RAM: 3x DIMM for Dual-Channel DDR400/333/266 Max 3GB
IDE: 2x ATA 133 up to 4 Devices
Slots: 1x AGP Pro/8X, 5x PCI, 1x Wi-Fi
Ports: 2xPS2,1xLPT,1xCOM,2xLAN,6xUSB2.0(Rear 4),SPDIF Out,Audio Ports
Onboard Audio: Realtek ALC650 6-Channel Codec
Onboard LAN: Realtek 8201BL 10/100Mbps + Marvell 88E8001 GbE
Onboard SATA/RAID: 2x Serial ATA by Silicon Image Sil3112A, RAID 0/1
Form Factor: ATX more info>
N82E16813131478 $92.50
Processors
AMD Athlon XP 2700+, 333MHz FSB, 256K Cache Processor - Retail
Packaging: Retail Box (Heatsink and Fan included) more info>
N82E16819103342 $107.00
Video Cards
MSI ATI RX9800PRO Video Card, 128MB DDR, 256-bit, DVI/S-Video, 8X AGP, Model "RX9800PRO-TD128" -RETAIL
N82E16814127127 $195.00
Subtotal » $ 733.49
You will need to add stuff like a floppy drive and keyboard and mouse.