I have G4 Apple iMac 17" 1GHz model which has been upgraded to 512mb ram, running OSX 10.3 (I think... will double check!) and a perfect first mac. If you want in depth specs, check here: http://lowendmac.com/imacs/17in-imac-g4-1-ghz.html
The machine runs really, really well, and it's a shame to get rid of it, but I need to upgrade for better photo editing software.
The computer is boxed, with official keyboard, mouse, speakers, manuals and disks, and everything is in great condition.
Images on request. It's all boxed up right now, but don't mind setting it up and photographing for serious enquiries.
Shipping by courier £30