Thanks for your opinions. Whereas you folks may not know precisely what these things should cost, you have a more experienced feel for what is reasonable, which is what I'm looking for.
I suspected that the yard was high, because I looked up the cost of the major components, and the labor (at $75 an hour, which is what they charge) just didn't make sense.
Also, there were several simple items in the quote that were transparently overpriced, which made me suspicious about the more complex ones. For example, I was quoted the following:
Varnish cabin sole with two coats of satin varathane.
I know from experience that this item is way overpriced.
Or how about the following:
Replace six Lifeline AGM 105 amp batteries (with minor repositioning)
I found the Lifeline AGM Group 31 batteries at an online price of $419.95 each (before freight) at:
6 x $419.95 = $2,519.70. At $75/hour that would allow 23 hours for installation -- or almost 3 full working days!
I particularly like your suggestions that I buy the components and have a good yard install them on the clock. Camaraderie's Sailnet package sounds especially attractive.