$600 to sand/soda blast eng compartment and underside?

The shop has had the car for nearly 3 years now. Sat untouched for 2 1/2 years and now they are working on it (at least for the last couple of weeks). I have also never priced blasting so was not sure what was good or bad.

The blaster is a mobile company that comes to his shop and does all the work. So no transport cost involved.