This. And since I manufacture parts of the system of car "bumpers" I'll also pipe in that I think that $1100 is a steal.
My brother-in-law was tapped lightly in a parking lot and the other guy asked if gotten a quote, could he just pay out of pocket the quote. He changed his mind when that small light tap was $2800 for the painted facia, the foam energy absorber, and the metal beam attached to the subframe underneath along with the labor.
Also in the OP, it was stated "he faxed me an estimate..." which I take as an itemized estimate from a shop.