Engine builders...this machining cost sound excessive?

That’s about right. I wanted to have my slant 6 machined, .030 over, quote was 600-800. 1600 if he assembled it. I Thanked him for his time and walked out surprised. Bought a running 360/727 out a low mileage RV for $325 still in the car 5 yrs later.
My original thought was a re-ring or maybe replacement pistons. My bores were nice and still had cross hatching but I figured start fresh. My new slugs are factory replacement H655-CP's. I didn't want to get into engine balancing.