They Pay Twice As Much, Which Is Half As Much As You Deserve

(I am the shop assistant in a secondhand store. A customer is buying a lampshade and seems dissatisfied with the price.)

Me: “Okay, that comes to £1.50, please.”

Customer: “That is not worth the money!”

Me: “Er… Excuse me?”

Customer: “The lampshade is not worth £1.50!”

Me: “I’m sorry, but I cannot change the price. You don’t have to buy it if you don’t want to.”

Customer: “I want it. I’ll pay £3.00 for it.”

Me: “But that is not the price. You’ll be paying double for it.”

Customer: “I know. It is worth much more than £1.50! I always pay what an item is worth!”

(She then dumped the money on the counter, grabbed the lampshade, and walked out of the shop. I decided to put the extra money in the charity donation box on the counter, as this was easier than trying to explain why we were an extra £1.50 up!)