Guess I could also mention my motorcycle hobby. So far I haven't done any selling but at some point (hopefully starting next year) I will begin to offer some parts and maybe a few bikes as well.
My collection is centric to the 2nd Generation Honda Interceptor, which were only produced from '86 to '87.
Getting parts for these bikes is getting harder and harder, but I have managed to "stockpile" a fair amount including brake parts, lights, mirrors, tanks, tool kits, electronics, seats, cooling system parts, fairings and cowls.
And carburetors....complete sets all rebuilt by me!