Amiga NYX prototype board on ebay.

"The Nyx was a stop-gap solution that would have provided a basic platform for OS development. Designed by Dave Haynie in 1992, the board is described as a 'kludge' to verify the AAA chipset and was based upon the A3000 architecture. The Nyx motherboard did not require a CPU, but contained a standard A3000 CPU module and (an estimated) '16 expensive, fast PAL devices'. In retrospect, Dave Haynie indicates that the same result could be produced using ' a modest CPLD or FPGA'. Only three are known to have existed"

http://cgi.ebay.com/Haynies-Garage-Nyx-AAA-Prototype-/130507479231?pt=LH_DefaultDomain_0&hash=item1e62da18bf
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http://www.amigahistory.co.uk/prototypes/nyx.html