We had a store here that sold parts for old farm machinery which is what we mostly run on our place. You could give the owner the most obscure descriptions of parts. " It's the red roundish rectangular thing that goes on the left side underneath the right hand fender". The guy would have the name and part number in seconds. He was some kind of 'parts wizard'. Closed down the place when head office wanted him to expand and he didn't want to. Man I miss that guy.