Cost of setting timing, on a V8 ??

I don't have a timing light, so I had a local Mechanic check, and re-set My timing, on My 383 Mopar, with electronic ignition. He did not get into the distributor, or carburetor. While doing this, He adjusted the 2 idle screws on the Edelbrock 600 CFM carburetor. -- It was a basic set the timing. - He used no parts - labor, only, and He charged Me $150. -- This is a small one man shop. -- I feel like I got "ripped off". -- Comments ??