What's the best purchase under 50 dollars you've ever made?

This “Haul Master” for unloading a pickup truck bed. Spent a summer cutting and removing sod and this saved me from a lot of work and pain. Still using it whenever I dump yard waste and construction/demolition debris. Stores nicely in the garage when not using it. I literally say it’s the best forty bucks I ever spent every time I use it.