Used G4

Anybody know what a fair price would be for this used G4?

Dual 1GHz G4 (Mirrored Drive Doors)
1 GB DDR SDRAM
80 GB ATA System HD
120 GB ATA HD (internal media drive)
Pioneer DVD-RW DVD-104 (Superdrive)
OSX 10.3.8

It's stock 2003. It's in fine working condition. I own it and I'm going to be moving into a G5 soon. Any input is appreciated!

Thanks,

Bruce Boykin
Zaniac Media