Having literally just done something similar to this, I can tell you that $125 is cheap for the amount of work that hood will require if your body guy does a quality job. But I would highly recommend viewing a carbon hood that he has refinished before having him work on yours to see if you approve of his work.
Your hood will not be perfect from all angles. The result you will get, if done correctly, will be a nice smooth top coat that will reflect light nicely and should make the hood look new again from a distance. As you get closer and start seeing light reflecting off of the carbon instead of the top coat is when you will be able to see the imperfections that were covered up by the new clear coat.