What drives the cost on a Huntington Beach install is almost always the condition of the opening, not the door itself. A straight swap onto sound 1970s framing is a different job than one where the jamb needs rebuilding or the header needs a doubled 2x. Homes on the older end of that 1953-1995 range are more likely to need the extra carpentry, simply because the wood has had more decades to move.
Household income in this service area runs a median of $101,138, and most of the 187,832 owner-occupied houses in the area were built to that same mid-century standard, so this isn't a rare situation - it's close to the norm for the area, not the exception.
We won't quote a number here without seeing the opening, because guessing low and finding rot once the old door's off the hinges helps nobody. What we can tell you is that the mild coastal climate here means we're not fighting the kind of freeze-thaw damage that cracks jambs inland - most of what we find is wear, not weather damage.