Thanks for your advice, Dan. I sent my list to Peter for some guidance. The auction history at Westlicht also gave me clues about some of my parts. It looks like collectors are still paying good money for Alpa cameras and lenses, and they did sell a few Macrostat parts. The modular nature of the Macrostat system makes much of it useable with just about any camera in the size range of a 35mm or dSLR: somebody must still be into macrophotography these days.