My last order was for four items. At checkout, parts 1 and 2 ship from warehouse A, and parts 3 and 4 ship from warehouse B. I then added part 5, shipping from warehouse B, but now part 2 ships from warehouse C. Three shipping points for five items. I deleted part 5, and part 2 reverted to warehouse A. What BS. I think they can have such low prices partly because they make significant profit on their shipping.