use rock auto but don't like the shipping charges if all the parts you order come from different warehouses
This may be why.....
RockAuto customers choose their own parts using our online catalog. We ship directly to our customers from wholesale warehouses or manufacturers. We have no retail stores, no counter-people and we don't have a lot of money tied up in slow-moving inventory.
I can sometimes get a better price out of Amazon.com when Amazon carries the part, not from a 2nd party. But with their (sometimes) free shipping, I find that the time it takes from Amazon isn't worth the wait. RA has always been 1 or two day delivery except when they state it is from an oulying warehouse. When it comes to brakes etc, they have som many suppliers it may be worth getting a more expensive part if it comes from the same warehouse. You just have to do some homework.