If you need an hard to find part and are not in a hurry for it this is the place to look.
They have an outstanding selection of parts. Many of which I have only been able to find either there or at one of the expensive specialty vendors. Of ten you can find what they call a “Wholesalers discount” these seem to be parts that they have purchased from other dealers who are either overstocked or closing their lines or doors.
These can be bout at a substantial savings. Now for the bad parts.
1. They ship from multiple warehouses. And charge a separate shipping for each warehouse.They do inform you as to the warehouse letter the Item is coming from. So you can try the many different choices of product until you have everything coming from one location if it is possible.
2. You don’t know the location of the warehouses. If it comes from one I can have the item within two days of the order being put in. However it might also be a warehouse on the west coast that will take over a week to get to me. This effectively kills their usefulness for time critical parts.
So if you have the time to wait you can get the parts at a very substantial savings. However if you need it now I would recommend local dealers if possible. Rock Auto does over overnight shipping but at the horrendous cost that the shipping companies charge for it. I can not in good conscious recommend it.
However I must admit that I saved enough on a alternator for my project Volvo that I could have paid for overnight and still been cheaper then local.
You will have to decide dependent on your own needs.