I recently came into possession of a 1.6GHz 17" iMac G5 with a 160GB HD and 1GB of RAM, but severe video distortion issues. Opened it up to find the two video power capacitors blown, and two Rubycon 6.3v 2200μF cap's later and boom. effective $10 iMac G5.

I'm probably going to end up getting an external HD for this and using it as my fileserver in place of my old G4 tower.