Picked this up at the thrift store for around $20. The performance could probably be better, but it is actually fairly decent, far exceeding my expectations for sure.
Processor: Intel Pentium 4 630 @ 3 GHz
RAM: 5 GB DDR2-533
160 GB Seagate 7200.7 SATA hard drive, and a replaced Sony DVD-RW drive
Display: Acer AL1706 17" 4:3 (hooked up via a KVM switch) @ 1280*1024 on VGA/ATI Radeon X300 SE.
Has the ATI video card, a Hauppauge WinTV analog capture card, and an Aureal Vortex2 PCI sound card.
Keyboard is (presently) an IBM PS/2 rubber dome job (hooked up via a KVM switch), mouse is a generic (eMachines?) PS/2 ball mouse.
OS: Windows XP with the POSReady update hack
Current status: In use as my video capture PC and streaming PC for my live streaming activities.