What are the real costs of shipping a car to the US from Germany(Europe)?

I am relocating to San Francisco from Cologne, Germany pretty soon and I am considering bringing our 1975 BMW 1502(really great condition). I have checked the costs of shipping to NYC and then we are planning on driving from there, but I am nervous about costs when I get to the US(taxes, updates, etc.).

Anyone done this process already? If so, what went well and what did not?