The Knife Seller

Have you ever met a man who carries a shoulder pole through the streets, selling kitchen knives? People come to buy, but he refuses to sell to anyone except you. When you offer him money, he won't take it. He just smiles and says, “Come back to settle the bill when two steamed buns can buy you a wife.” If you meet him, don't think you've gotten a bargain. What you'll end up paying will be far more than the price of a kitchen knife...