If you're interested in the Micromint BCC52 and related controllers,
check out these current auctions:

Micromint BCC30 12 Bit 16 Channel A/D Converter
http://cgi.ebay.com/ws/eBayISAPI.dll... STRK:MESE:IT

Micromint MB08 Motherboard CC01 Cardcage 8 Slot
http://cgi.ebay.com/ws/eBayISAPI.dll... STRK:MESE:IT

Micromint BCC52/43D Direct Drive I/O Expansion & ROM C
http://cgi.ebay.com/ws/eBayISAPI.dll... STRK:MESE:IT

current prices $5.99 - $9.99