I ordered 2 from pelican for my 300SD, one was the cheapest rebuilt one, and one was a little more expensive because the cheapest one was out of stock.

The cheaper one was actually in a box that said ATE original parts on it, but the other one was missing some of the hardware and the core wasn't even the right kind of caliper.

I wish I could find another of the ATE rebuilt calipers, but I kinda got blown off when I tried to find out if pelican was going to stock them again.