Well if you're getting a quote from a repair shop I'm assuming they would also install them, so $50 worth of parts add labor and that would explain the $200+ quote. Of course if you're uneasy doing your own brake work then it's money wisely spent to make sure it's done properly and safely.
If you are going to do the yourself then $200 is way to much to spend. Like your own research shows, they can be had for a lot less. I've tried all different reman. calipers: OEM Ford, Autozone, AAP, Napa, and have never noticed any difference in quality among them. They've all worked just fine. So get what makes you happy and know it doesn't have to cost too much.