Because no one can quote an accurate price over the phone, those that just give a price are most likely trying to get “the foot in the door”. Even a company that works by the hour all they can do is inform you of how much they charge by the hour. In the service and repair plumbing industry no one job is exactly the same as any other, job times vary and parts involved may have to be different the ones you already have. There are simply too many variables for one to be able to quote accurately over the phone.