I went to a Photorama show today- been going for almost 30 years. Not many people came out, it as a nice day and some road construction near the show. There are not many camera shows left these days. My favorite camera dealer was there today, waiting for me. Brought in 3 boxes of camera and lens cases, Leica, Canon, Nikon. Wanted to clear them out- I bought all of them. Also bought a Canon 5cm F2 and 50/1.9, each needed the button and spring for the infinity lock. Needed to be cleaned/lubed. the F1.9 looked like the aperture blades were all over the place, turned out to be the paint from them going all over the place. $50 each. Both cleaned up well, I had a spare infinity lock mechanism from a 50/1.5 Helical. The F2 is rare- easily worth the $300 that I spent today. The F1.9 is best left in extended position- the felt needs to be replaced. But it is clean, lubed, and no more paint flakes. If you see a how in your area- attend them while you can.