I bought a 500MHz Sawtooth for $50 shipped last fall, because it was "broken." However, it was just a bad stick of RAM that caused the startup woes.

I used it to learn OS X server, and used it as a home server for a while. I still don't know Server as well as I want to, so it doesn't serve anything anymore. I do use it to NetBoot Macs without a hard drive though!

The G4s still make very competent web browsers and iLife and Office machines, and run Tiger wonderfully, so enjoy your new conquest!