Anyone in southern Tasmania, Australia will pick up a bargain here.
http://www.gumtree.com.au/s-ad/midway-point/desktops/morphos-power-mac-g...
HINT HINT MAEDI (probably right up your neck of the woods) 
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2013, July 16 - 1:02pm
#1
AUS$90 Dual 1.42 G4 MDD
Comments
2013, July 16 - 6:34pm
#2
http://www.gumtree.com.au/s-ad/taroona/desktops/mac-desktop-round-style-...
Is that a 17" iMac G4 at the bottom of the same page for $35 ?
2013, July 18 - 12:01pm
#3
It sure looks like it bertyboy, either that, or the monitor was WAY forward when the photo was taken 
I just got my 15", so no hurry to upgrade (would love USB2.0 and Firewire800 tho).
2013, July 18 - 12:17pm
#4
I may have scooped my best bargain yet, for only $50 (NZ) too. We'll all find out over the weekend when I get my hands on it. Had to pass up on a fully funtional B&W G3 tower for $7 tho.
2013, July 19 - 11:13am
#5
Got an update, that IS a 17" G4 iMac, 1.0GHz, 80GB HDD, dunno the RAM, but should have Airport installed, and comes with SuperDrive. 10/100 ethernet and Modem. If you need to know more specs, help out:
Model no M6498 EMC NO 1956
That is all the info I could find in a quick search.