I hear you on that. When I did front brakes, I called ahead and said I wanted calipers, pads, rotors, and new inner/outer bearings with seals. And to get a bucket of the appropriate grease for the bearings. I got the box, paid and got home, did it all. A week later, bearings on both sides were shot. The grease which was yellow, was now black and smelt like a burnt frying pan.
I got some lucas x-heavy duty bearing grease, it still green after 10k. Don't skimp on the grease!