My grandpa was the stingiest man I ever knew — the kind of person who reused ziplock bags, cut paper towels into thirds, and pocketed sugar packets at restaurants. So when he died and left me a single old-fashioned $100 coupon from a store I’d never heard of, I assumed it was a joke. Still, I kept it in my wallet for a week, unable to throw away what felt like his final prank. Eventually, curiosity won, and I decided to visit the store printed on the coupon. Inside the small, forgotten shop, everything seemed normal — until the cashier...
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