You take your car to the mechanic; it’s been making a funny grinding noise when you press on the gas pedal. The mechanic tells you what’s wrong and what needs to be fixed, then socks you with the estimate.

How can you tell he’s not embellishing a lot of the “diagnosis”? You know nothing about cars. You have to take his word for it. What if the second opinion is also from a scammer and sounds a lot like the first opinion? You’re screwed.
An article at carbuying.jalopnik.com describes five auto repa








