I am taking orders, selecting and selling cameras for photographers friends that I know personally. They usually let me know what they seek, and I try to find an item that fits their requirements. This way it is good because I have the various models in hands and can check everything thoroughly before acquiring it for them.
Honestly if I'd have more cash I'd settle with a 4/50 MC CZJ Flektogon and a 2.8/180 MC CZJ Sonnar for my Pentacon Six. And a pre-war ContaxII , of course 😀
If you ever come by Prague, let me know 😉