A regular came in convinced he needed a big expensive repair a friend told him about. I checked it over and told him his car was fine, and sent him off without charging a dime. I could've taken the money and he'd have thanked me for it. But my whole reputation is built on being the guy who won't do that.
More people experience this than they realize.
You would rather lose a sale than lose the trust that makes your work worth anything.
If this sounds familiar, the Library can help you find the bigger picture.