I had been shopping for a new (used) car last year. I live in Waltham and didn’t know any mechanics in Lawrence. I brought a Craig’s List, private dealer car to Sanchez Sunoco to be checked out before any possibly buying it. I don’t know if the mechanic is still working here but if he is, you can trust him implicitly. His name is William and he was extremely fair to not only myself but the local guy who was selling the car, which, unfortunately, needed more work than I wanted to invest in.