What a lovely bed. It really is exceptionally pretty. I'd guesstimate the value in the San Francisco bay area to be about the same as Hosman's estimate for Seattle if you were selling it privately on craigslist or some other venue. It would get a bit more in a retail store.
It really is a lovely bed, it is too bad that it has to leave your family. Is there no way that someone in your family can purchase it? Once a special item like this leaves your family it can never ever be replaced. It is so much better for items to stay in the family if at all possible.