Warren Buffett is the third richest man in the world, with an estimated net worth of $75 billion. But the Oracle of Omaha still values a good deal.

In Bill and Melinda Gates' 2017 annual letter, which they addressed to longtime friend Buffett, Bill tells the story of a particularly economical lunch Buffett took him out for years ago.



"Remember the laugh we had when we traveled together to Hong Kong and decided to get lunch at McDonald's? You offered to pay, dug into your pocket, and pulled out … coupons!" writes Bill.

