I had a whole collection of that stuff when I was a teenager. It was all moped and motorcycle parts. When I moved out Dad tossed it all at the dump.
5 Complete Tomos and Motobecane mopeds with DMV papers, and 3 of them ran great, went to the dump. Many boxes of handlebars with controls, voltage regulators, carburetors, lighting, ect., you name it, mostly Honda and Suzuki... gone.
Now that I have my own garage I have started again only it's all random spare parts from clothes washers, microwaves, drill presses, cars, ??? with no clue what they may create in the future.
I still want to make a multi speed belt driven motorized bicycle using the drill press pulleys but I haven't put in any time to figure out a derailleur for the belt.