ECS K7S5A PRO USB 2.0 SiS® 735 SOCKET A MOTHERBOARD - RETAIL:
$60 USD
It has 5 PCI, 1AGP, 1 AMR (ugh), 2 DDR slots, and 2 SDR slots for memory (only one type at a time please). It has USB 2.0 but not firewire - if I need that I will have plenty of PCI slots to use for that.
AMD ATHLON XP 1700 RETAIL
$63
Next step is to upgrade my memory from 512MB of PC133 to 1GB of DDR266!
$60 USD
It has 5 PCI, 1AGP, 1 AMR (ugh), 2 DDR slots, and 2 SDR slots for memory (only one type at a time please). It has USB 2.0 but not firewire - if I need that I will have plenty of PCI slots to use for that.

AMD ATHLON XP 1700 RETAIL
$63
Next step is to upgrade my memory from 512MB of PC133 to 1GB of DDR266!