That's what he gets for buying a plastic GM car. lol
I think $1300 is reasonable, I would have guessed $1000. I did $1300 in damage but it was down the bedside with no damage to bumpers, lights, etc. Just the metal surface.
They are most likely going to rework that fender, and the COST is from having to blend the Fender into the DOOR and the HOOD to get the paint to look like it matches.
I agree with Chris, get parts cheaper and bring them in to body shop. Do all the R&R your self to save labor. Anyone can turn a ratchet...