Unfortunately, that is the going rate. I had a caliper go bad on my '07 Accord. The caliper pin seized up and wore the pad and rotor out. It is a fairly common thing to go wrong for the 7th generation Accord. They did a complete replacement of my rear brakes (pads, rotors, calipers) and it cost $800... and that was at an independent shop, not at the dealer, either.
I decided from that day on that I would do my brakes on my own the next time they went bad. There are enough youtube videos out there for auto repair that it's likely there is a DIY guide for your make/model. It depends on the model, but most cars really aren't that hard. If you can change your oil or do other minor repairs, you can likely change your car's pads and rotors.