There was a time when local parts stores had knowledgeable, caring "countermen".
Pay went down with the rise of the big-chain parts stores, the old guys got cancer and cirrhosis from too many cigarettes and too much booze. Now the parts counters are staffed with guys who can look things up on a computer, and you need make, model, year, month, engine option, brake option, trim options, carpet color, and/or the VIN number before they can walk to the back of the store and pick your part...if the computer shows stock. Otherwise it gets ordered, and maybe they nick you for freight charges, too.