When ordering parts from Canada, often the shipping is as much as the parts. Therefore I try to order many things at once. However, the multi warehouse thing is ridiculous. You can't even get light bulbs for the same car from one warehouse. I would buy much more if rock auto would assemble an order and ship complete. I would be willing to wait several extra days to maximize value. I find it hard to find generic parts. Stuff that fits many vehicles. Why don't you sell block heaters?