This mobo has seen about 2 years of medium service. Asus A8V-Deluxe. Socket 939 (athlon, athlon x2, Opteron) Has 1 VGA slot (ouch!) and 4 pci. 4 DDR ram, gigabit ethernet, plenty of USB, 4 SATA (with two onboard RAID controllers), etc...
I also have a socket 939 athlon 64 3800, I believe it is Venice core clocked at 2.4ghz. Good chip; it too has seen about 2 years of medium service.
I played Halo, Quake 4, FEAR, HL2, Doom3, etc... on these very well. I don't know what the best AGP graphics card that is still available, but You could probably put together an OK everyday gamer for under 200 if you already have a case and PSU.
make an offer in PM if you are interested.