I sold my dual G4 1.24Ghz with 2gigs of RAM and an upgraded video card for $450 2 summers ago.
It doesn't hurt to contact them and offer them a price.
REally? I didn't even know the G4 had a dual core option.
What about $125 for an 867MHz G4 Power Mac with a 60Gig HD and 768MB RAM, and a monitor and keyboard/mouse
It was dual processors, not dual core. I'd say that is a reasonable price, but Macs do hold their value. I would say depending on the condition of the machine it would sell for $100 to $200.