I'd been waiting for a genuine Bondi Blue tray loading iMac G3 to appear on Trade Me for about a year. Finally one did!http://www.classic-computers.org.nz/collection/imac.htm
First thing I did was change the battery of course, which was very flat. No leakage though, luckily.
Now I have to figure out where to put it. The computer shack has barely enough room for me in there now!