We are not going to list numbers here that do not mean anything until we have seen your door, but we can tell you what actually moves the cost. The age of the door matters more than almost anything else - a torsion spring sized for a door built in the 1970s may not be a stock part anymore, and tracking one down or fabricating a fix takes longer than swapping a current part off the truck.
Double doors cost more to fix than single doors because the springs and cables carry more load and the hardware tends to be heavier gauge. Insulated doors, more common on the newer end of the local housing stock, add weight that changes which spring size you need, too. Those two factors alone explain most of the spread between one quote and the next.
Household income in this area runs close to $96,190, well above a lot of surrounding communities, and we have found most owners here would rather pay once for the right part than patch something twice. That shapes how we quote jobs - we would rather tell you a repair will not hold than sell you one that will not. We will give you a number before we touch anything, and it will not change once we are inside the garage unless we find something we could not see from outside.