Original OPENSTEP 4.2 CDs. 3 CDs include: OPENSTEP, OPENSTEP Developer, OPENSTEP Enterprise. CDs have Apple Computer copyright (last OPENSTEP version before Apple bought NeXT). OPENSTEP was the basis for OS X.
Can be used to install OPENSTEP on m68k black hardware, i386 white hardware and Sun hardware (I haven't tested installing on Sun hardware).
http://picasaweb.google.com/simplepractices/FSLowEndMac#5263402543440420594Selling for $150 shipped to the lower 48.