Sweet! I had also been wanting a G3 iMac for a long while (since...2017??) until I got my first one sometime in late 2020-early 2021. Be warned, it's very common to see these develop analog board issues. I've got some recapping to do with my blueberry at least, and to do so you have to get the front bezel off which is near impossible to do without it breaking. So here's hoping you avoid all that. The speakers also like to go bad, as do the belts on the optical drive, causing the eject motor to not work well. These can all be fixed with a bit of work though.
Your units look great. Hardly any yellowing on the inner bezels, which is common. Make sure to pull those PRAM batteries!