My Pismo as an ex-school machine, sitting unused for some time as "dead". $50 and a quick pull of the PRAM battery sorted that problem out 
It's running with 768MB RAM and 80GB HD, Combo CDRW/DVD drive, and 10.4.11, it's working a treat. It has just about the strongest wireless reception of any Mac I've used, and can take a good knock or two without any issues. Batteries are expensive though, I've two marginal ones that give about one hour each, enough for moving around the house.
JB
It's running with 768MB RAM and 80GB HD, Combo CDRW/DVD drive, and 10.4.11, it's working a treat. It has just about the strongest wireless reception of any Mac I've used, and can take a good knock or two without any issues. Batteries are expensive though, I've two marginal ones that give about one hour each, enough for moving around the house.
JB