I have one that is from an HP desktop that I lost the HDD to (failure not lost). 3 PCI, 1 AGP 8x, 2 SATA 150 ports (most SATA 300 are backwards compatible.), 2 IDE/PATA ports, 1 FDD port, 20 Pin main, 4 pin CPU power, 4 x DDR up to 1GB per slot. Ran Win 2000 (my preference) and Win XP Pro (factory) equally well with 1.5 GB of ram and 2.66 HT P4 (800/1mb). The board itself is an ASUS P4LD with locked BIOS, but that probably could be fixed via flashing the BIOS from the ASUS site. I never tried because I was happy with the processor at stock, thus no need for OC BIOS settings.
PM with an offer if you want it, or have any questions.