Ran a shop for years and the same misunderstandings come up constantly. Sharing them here in case it saves someone money:

1. "Diagnostic fee" isn't a scam. It's the time it takes to actually find the problem instead of guessing and replacing parts until something works (which costs you way more). A shop that waives it is usually making it up somewhere else.

2. The cheapest quote is rarely the cheapest outcome. Ask what brand of parts they're using (OEM vs aftermarket) and whether labor is warrantied. A $200 gap between two quotes is often the difference between a 12-month warranty and none.

3. "Your brakes are fine" should come with numbers, not vibes. Ask for the pad thickness in millimeters. Any shop that can't give you a number is guessing — and a shop that gives you a number without you asking is one you keep.

Built my whole membership model around exactly this — flat pricing shown upfront, free inspection every visit, no surprise upsells. Happy to answer questions if anyone's dealing with a shady quote right now.