I would like to dispose of my old camera lenses. They were good in their day, but now the demand for metal and glass screw thread lenses has gone, but they just seem too nice to just throw in the bin. Even charity shops say they don't want them. A camera shop will take them if I make a big purchase but I don't need a cameral now. Some of the leading brands such as Leica of course have historical value, but my old M42 and Konical lenses are technically worthless. I just cannot bear to just add them to the crusher. I would have thought that they would have a use somewhere, but I need to know where to send them.