re: Baseball card spinoff: your most valuable item you own (collectible,...

I've got a pretty good collection of old woodworking hand tools and a few older machine tools. The oldest being a 1927 Southbend metal lathe I restored. I've been picking up a few manual focus camera lenses. Nothing really expensive though. What's your best lens find? I bought an Olympus 50/1.4 lens from a lady at an antique store who told me she had come across German lenses at an estate sale, but she didn't buy them.