Pretty much echos what I sent her in the PM. I also added lot size in addition to location and making sure you are comparing similar houses of the same size when doing comps. When you do braod based comps around a property it creates issues even in places like La Costa. Defintely need to look for true comparable properties in that kind of analysis not just properties that sold in the same ZIP code.
If the price a house like that ever got into the low 300″s there wouldnt be enough paper in the listing agents fax machine to field all the offers. Prices in places like that are pretty affordable. if they get more affordable the demand skyrockets and good luck being the lotto winner who gets the house.
This is an expensive place to live and I dont see that changing.