Asked a tremendous amount of money to fix my vehic...

Asked a tremendous amount of money to fix my vehicle's problem, so I declined repairs and was surprised with a $57 bill in the mail a month later. While they must be doing something right to stay in business, I can only expect they choose to deal with a small number of customers who are willing to pay substantially higher than normal prices.

Update after response:
Typically, payment is expected when services are rendered. Sending a bill weeks after the fact (and after I've taken my vehicle away) is not a good business practice. I wouldn't be annoyed by this if I were simply told I owed money at the time instead of being blindsided.