Please take a god look at the Chome plating process. From my past history with plating, chrome does not like to stick to bare metals. The parts that I was dealing with were flashed with copper ( because copper plates to almost anything and makes a great base for plating), then a thin coat of nickel for durability and then finally a chrome plating. This may explain some of the cost. You will also have to pay for masking certain areas and internal threads for three plating processes.