We don't publish a flat price list, and there's a straight reason for it. The two biggest cost drivers, the size and weight rating of the spring and whether the opener's logic board is still made, vary door to door across a service area with houses spanning more than thirty years of construction. A single spring on a standard door is a different part and a different job than the dual springs on a heavier insulated door, and pretending otherwise with a one-size number would just mean quoting you wrong.
Here's what we can tell you plainly. A spring replacement is a same-visit job in almost every case, because that part doesn't need custom ordering. An opener swap costs more because the unit itself is most of the bill, not the labor. Panel replacement on an older door is where the cost gets unpredictable fast: if the manufacturer discontinued that panel profile, we're sourcing a full new door section or recommending full replacement instead of chasing a part that no longer exists.