Three things come up often enough to put in writing.
Sometimes it is not worth repairing. An opener built before 1993 predates the federal entrapment protection requirement under 16 CFR Part 1211, and no retrofit makes it compliant. On a family house that is a replacement, and we will say so rather than take money for a repair.
Often it is cheaper than you expect. A door that reverses halfway is usually dust on a safety sensor lens, not a new opener. A noisy door is usually rollers, not a new motor. We would rather talk you through a two-minute fix on the phone than send a truck for it.
Occasionally the answer is somebody else. If your address is in the Town of Paradise Valley, or anywhere outside the Phoenix city limits, we are the wrong company and you will hear that on the first call rather than after a truck is dispatched.