HI Joe, I looked very closely at the keyboard on the e-bay page and the key directly beneath the escape key(esc) and the key above the return/enter on my G3 iBook are different than the e-bay page--it appears that they moved them which may not be a problem but they added a key--The one below the escape is not present on the G3 keyboard--this is a problem unless apple used a universal cable that was used on all keyboards and just opted not to use that contact on my type of G3--
I'm not saying it will not work, but I wouldn't go through the hassle of buying,trying,returning----good luck
If you care or not, Ijust plug in a regular iMac keyboard via usb for all my long inputs.