MacMini A1103 PPC-G4 with power supply and installed with unregistered MorphOS 3.9.  Tested working.

DOES NOT INCLUDE KEYBOARD, MOUSE, or ANYTHING ELSE.
"MorphOS is a lightweight, highly efficient and flexible desktop operating system. It includes primarily proprietary as well as open - source components. Its many features range from a modern exceptionally customizable graphical user interface, which can utilize 3D hardware acceleration, to a high-performance Just-in-Time compiler that emulates the 68k family of processors and thereby allows to transparently execute legacy applications developed for the Commodore Ax00 series of computers."
MorphOS 3.9 is the latest release of the next generation AmigaOS-like and compatible operating system.  While its own self-contained OS with an extensive library of productivity software and games, both free and commercial, MorphOS is also compatible with OS-friendly Amiga 68k software.  More information available at http://morphos.de