We don't have a Forest Hills-specific price list to quote here, and giving you a number without seeing the door and the spring type would be a guess, not a quote. What we can tell you is what drives the number up or down on a house like this: whether the springs are original extension-style or a prior owner upgraded to torsion, whether the cable snapped clean or took the pulley with it, and whether the opener's drive gear is still available or needs a full unit swap.
Forest Hills carries a median household income above $250,000, well above the roughly $92,292 median across the broader Smyrna service area. That doesn't change what a spring or a cable costs - hardware is hardware - but it does mean more Forest Hills calls end in a full opener or spring-system upgrade rather than a patch repair, because the owner would rather replace outdated hardware once than keep feeding parts into a 1970-era system. We'll tell you straight when a repair is the cheaper call and when it isn't worth doing twice.