Went into the local Checker for a price quote on Russell braided corner lines for a 510, with part number in hand. The jerk behind the counter started laughing hysterically and said "Why in the hell would you want those? For a Porsche or Jaguar I could understand it, but it's a berkeleying Datsun !"
I laughed just as hysterically when he quoted me a price that indicated that CSK must have been PURCHASING them at MSRP, went home and ordered them at a discount from MSRP from a guy working out of a spare bedroom.
OTOH, the counter guy at a different Checker made my day when he told me that they couldn't get a rebuild kit for a Weber DGV for the same Datsun because "That's a racing carburetor, and we don't support those !"
The local VatoZone really made my day when I asked them to look up the part number for an oil filter for my bone stock '91 G20 on the computer. As I walked back to grab it, I heard the one kid behind the counter tell the other "WOW, an SR20- He's got the Bluebird SSS racing engine!!" I swear they were not being smartasses, and still have no idea where they got their information from, or for that matter, what they were talking about...