If it was just pads and rotors, you over-paid. However, if there were other issues (e.g. caliper, wheel bearing, etc) then it might not be so bad.
For a pro, to do all the brakes is a 2 hour job at most. If you price the most expensive OEM pads and rotors (e.g. ATE rotors and Pagid pads), and calculated labor at 150 per hour, you'll quickly realise how badly you overpaid...