To get away from motorcycles a little.....classic cars can be lovely and unlike our 2-wheel jobs, they are very costly to keep on the road. That I believe is mostly because of rust. Mechanical and electrical parts can be found or, many classic car owners being not exactly short of cash, can be made singly (if you can find a company willing to do it). Tyres in unusual sizes may not be available off the shelf, but wait a little and some maker will produce a batch. But what if a stone hits the windscreen (windshield) and a spare is no longer available? I can't imagine our big glass companies making just one. And even a small crack in the screen would make a car fail its MOT (annual roadworthiness test). Would that make my million $ Bugatti classic just so much unusable (and ugly) scrap metal? Does anyone know?