If you have a relatively rare car, you mostly buy anything that comes your way. I have a habit of not throwing any parts to cars that I am working on away. I figure that fifty years from now they may not know what original parts went to these cars are. even when I replace parts, I do not throw them away. I try to keep the parts , however small and insignificant, with the car that they belong to. When you have cars that are one of the last examples that are left I figure that at some time the old parts may be useful. There was a story about a train locomotive from the 1840s that was recovered from the ocean. It was interesting because of the original type of safety pop off valves that it had. these valves would wear out pretty quickly and were replaced with new ones. This had happened so many times that nobody knew what the original valves actually looked like anymore. By saving all the original parts I am hoping to avoid the loss of information on how the old cars were constructed. Probably most of the things that I save will just be useless junk but there may be the occasional part that that will tell us something.