I have an iMac G3 (summer 2001) 600MHz for sale. It is the last iMac manufactured before the G4 model, and thus among the fastest iMac G3s ever made.
The computer has a built-in 15" monitor and a 40GB hard drive. It is in excellent condition, rarely having been used since my purchase. (Why did I buy it? Uh, good question ...) The iMac has been expanded to the maximum 1GB of PC100 SDRAM and has an Airport wireless card, both expensive and hard to find today. It comes with the transparent Apple Pro Keyboard and Mouse. OS X 10.3 Panther is preinstalled, and the installation CDs and bundled software like World Book are also included.
The computer is ideal for those who need to run pre-OS X Mac applications with the "real" Mac OS 9it was among the last Macs to be able to run itor OS X's "Classic" environment, which is not available on any Intel Mac. It can also run PowerPC applications that OS X no longer supports as of 10.7 Lion. The iMac is also a good choice for parents who want an inexpensive, durable computer for children.
I also have Microsoft Office 2004 for PowerPC OS X for sale for $20.
Computer is still for sale as long as ad is up. I take credit cards via Square (+2.75% processing fee) or cash (no fee).