A quote is only as good as what it's based on. Over the phone, we can price openers, rollers, weatherstripping, and simple hardware swaps pretty tightly because those parts don't vary much door to door. What we can't price blind is a broken torsion spring, a bent track, or panel damage, because the right part depends on the specific door in front of us, and this area has a wide spread of ages, from doors installed new in the late 1960s to ones put in closer to 1998.
Our climate here runs mild with the occasional freeze, so we're not chasing the kind of freeze-thaw cracking that colder regions deal with. That keeps some repairs simpler than they'd be up north, but it doesn't make every job the same price.
If a repair is going to cost close to what a new door would run, we'll tell you that instead of patching something that's going to fail again in a year. That's the honest version of a quote: a real number where we can give one, and a same-day look when we can't.