[SiliconJon]

You'll have to divorce the AGP, but a good price for a new 939 mobo:

ASUS A8S-X SE Socket 939 Mainboard w/ DDR1, PCI Express x16, LAN - OEM w/ Backplate Included at 3B Tech - Buy computer parts, notebooks, desktops, & home electronics

ASUS A8S-X SE Socket 939 Mainboard w/ DDR1, PCI Express x16, LAN - OEM w/ Backplate Included

CPU Socket 939 for AMD Athlon 64FX / Athlon 64 X2/Athlon 64
AMD Cool 'n' Quiet
Chipset SIS 756
SIS 965L
System Bus
Memory 4 x DIMM, max. 4GB, DDR400, ECC, non-ECC, un-buffered memory
Dual Channel Architecture
Expansion Slots 1 x PCI-E x16
2 x PCI-E x1
3 x PCI
Storage
Audio ADI AD1986A SoundMAX 6-channel CODEC
S/PDIF out interface
LAN Intel PCI LAN
USB 8 USB2.0 ports
Special Features ASUS AI Overclocking
ASUS MyLogo
ASUS EZ Flash
ASUS Q-Fan
ASUS CrashFree BIOS 2
ASUS C.P.R.
SFS (Stepless Frequency Selection) from 200MHz up to 300MHz at 1MHz increment
Adjustable FSB/DDR ratio, Fixed PCIEX/PCI frequencies
Back Panel I/O Ports 1 x Parallel
1 x Serial
1 x PS/2 Keyboard
1 x PS/2 Mouse
1 x 5.1 channel Audio I/O
1 x RJ45
1 x S/PDIF Out (Coaxial)
4 x USB
Internal I/O Connectors 2 x USB connector supports additional 4 USB ports
CPU / Chassis / Power FAN connectors
24-pin ATX Power connector
4-pin ATX 12V Power connector
Chassis Intrusion
CD / AUX audio in
GAME connector
Front panel audio connector