Chevy sells 10-100 to 1, what if they where the same cost, think that number would get closer? Then the buyer has a choice, and don't think Chevy guys aren't cheap either, they bought Chevy stuff didn't they. It's all marketing anyway, they only want to stock one brand not three, too much money tied up in inventory. You want to pay twice for something they'll order it then gladly sell it to you.