Prices seem reasonable to me, infact sounds like pretty rockbottom for a professional yard.
Are topsides being awlgripped? If so, $150-200 per foot are common going rates, so $3000 is low. Awlgripping a deck is about twice the hull rate, assuming all hardware is removed and rebedded, only $3,850 is disconcertingly low. This sounds like just taping the fittings and brushing on some house paint. If the deck is not done artfully and well, you'll be looking at an unpleasant result, always in sight and underhand, for the rest of the life of the boat.
My advice is check out somewhere like NEB New England Boatworks Builders of advanced composite sailing and power yachts
, visit there and see the quality of the work they do. You are likely to pay substantially more, but are likely to get everything you pay for, and have a gem that will put a smile on your face for 20 years.