I'm selling an older dual processor PowerMac G4. It's a bit skimpy on the specs, but it's a great base system for installing upgrades and so forth. Here's what it has:
Dual 450 MHz G4 processor
512 MB of RAM
30 GB hard drive
12x CD-RW drive pulled from a Quicksilver
Rage 128 Pro video card with ADC and VGA ports
No modem
Apple Pro Keyboard with USB extension cable and Apple Pro Mouse included
The Pro Mouse is fraying a bit where the cord connects to the mouse, but I thought I may as well include it since I don't have a use for it here. Other than that (and the lack of a hard drive), this system is pretty complete. It's fine for general use in OS X. Add a hard drive and a good monitor and you've got yourself a fine computer to use as a server, stats cruncher, or as a primary computer. Having dual processors really helps a lot with OS X.
My asking price is $575 shipped, via UPS. I will include insurance and tracking with that. I'm in Minneapolis, Minnesota, so anyone who lives near here is welcome to do a local pickup to save on shipping costs.
If you want better graphics, I also have a Radeon Mac Edition that I'm selling on eBay
here. The Radeon will enable Quartz Extreme, which should make the OS X interface much smoother.
EDIT: Here are some pictures of the computer:
