The memory finally arrived for the iMac G4, so I now have a 2GB 1.25GHz 20" iMac G4 with a 320GB hard drive, WiFi, Bluetooth, DVD writer, Apple keyboard and mouse, the original Apple speakers, OS X 10.5 and software including Office 2004 (a legit copy with disk etc.), Bejewelled and a couple of war games (again with disks), and a route planning program (ditto) that is possibly too old to be useful. There are a couple of flaws, most notably a stress crack in the perspex screen surround, but it's generally in excellent condition, the screen works perfectly, the DVD writer is fully operational, etc.
At some point I will have to sell it but I think this will wait until the new year, I really don't want to be faffing around with couriers etc. in the "festive" season.