I just upgraded my PowerMac G4 and I need to sell the old processor. The card is a dual G4/450 MHz, with 1 MB of backside L2 cache per processor. I'm including the CPU card itself as well as the original heatsink, just no screws.
This card should work on most AGP PowerMac G4s with a 100 MHz bus. If you put it in a 133 MHz bus machine, it'll try to run at 600 MHz and that probably won't go over too well with the processor.
My asking price is $100 shipped within the US. Local pickups welcome (I'm in Minneapolis). Also, pictures are available if you want them.