How much cost to repair hole in the main water line?

There is a slow leak close to the main line, which has been leaking for about 3 weeks, and the city now says that the leak is on our side, not theirs. Our neighbor handyman will repair this, and it requires some digging, but he says the hole in the pipe is slightly large (how ever big that is?!) and he'll... show more There is a slow leak close to the main line, which has been leaking for about 3 weeks, and the city now says that the leak is on our side, not theirs. Our neighbor handyman will repair this, and it requires some digging, but he says the hole in the pipe is slightly large (how ever big that is?!) and he'll repair it, but I don't know how much to pay him. Any suggestions? 
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