I'd like a few of these, especially any slot loaders - for spares, just for the CD drive in an attempt to find a serviceble one - which is improbable. Wouldn't pay more than pocket-money though - max $15.
I often check out the ads for the Ruby G3 iMac (behind closed doors of course - with nobody looking over my shoulder

), and they do appear to be fairly scarce compared to all the other colours.
Just seen a Ruby here in France listed at 180euros ($US208). Needless to say I wouldn't pay anywhere near that price. In comparison - and far more difficult to find - my iMac Dalmation and Flower-Power each cost half that.
The other ad this week which made me blink a few times was this:
1999 Imac G3, perfect condition for collectors, little used. With its original box and all accessories containing mouse, keyboard, mouse pad, cd player & connection cables. With external CD drive & CD's. Price 769euros!!
(Wait for it.................) only a cool $US890.
And this is for an iMac that I have little doubt is not completely functional, which is probably why it's offered with an external drive. The photo shows the iMac is a slot loader, and these CW7121 model drives (which I term 'squeeze-roller' type) are notoriously unreliable. I should know as I've tried to resurrect quite a few (like the equally unreliable Cube G4 SR-8186 model CD/DVD drive) - which I've also lost sleep over when attempting to refurbish.
As a side issue, only last week I was successful in resurrecting a defective CW7121 model drive from a G3 iMac to install in my G4 Cube. Will give details in a further post.