i spent $98 a piece for remanufactured calipers and $100 for four slotted/drilled rotors from summit racing. $163 for labor is roughly 2.5 hours which isn't entirely unreasonable. It's certainly not fast, but considering they may have spent time diagnosing any possible issues it's not impossible. $500 would have been a fairer price.
I'd also suggest learning to work on your brakes. It's all fairly easy and youtube diy channels are invaluable. When you're tight on cash you might impress yourself with the diy projects you can accomplish.