Before you decide to purchase in California, here's a great "tax avoidance" play.
Establish what address you will be at in California for shipping purposes.
Arrange to purchase the Linhof from B&H in NY to be shipped to your CA address. If B&H ships out-of-state (i.e. from NY to CA) they do not have to charge you the sales tax!
Just make sure that the sales tax savings exceed the shipping costs versus what it would cost to just buy the camera in CA.
The safest way to not to pay any sales taxes is to have it shipped to a state with out a sales tax. I've seen internet vendor charge sales taxes for the states that have them. Most states do have a sales tax but there are a few which don't. I don't know all the states that don't have state sale taxes but California and Washington do have sales taxes.