When you write "brake job" do you mean both front and rear? If so, $200 is almost too cheap, I'd ask questions about it.
You can get cheap rotors that get hard spots quicker (aka warping) or get eaten away by the pads quicker and develop ridges. You can get cheap pads that are noisy, and filthy semi-metallic or worse gripping (cheaper grade of) ceramic.
These cheap combos can work fine for someone who drives conservatively (OR be noisy the whole time, especially on a lazily done job or not broken in right) but generally have shorter service life and a worse braking experience towards the end of that. They can easily be a false economy if you pay someone else a shop labor rate to fix them later, and aren't planning on getting rid of the vehicle before it needs brakes done again.
It would've been easier if you had mentioned make and model of vehicle, but decent quality rotors for an older midsized sedan run about $35 ea, +/- $5 depending on make, model, and special discounts. Decent ceramic pads run about $20 to $35, again depending on the same variables. These are Amazon or Rock Auto price ranges (Rock Auto including at least $16 addt'l shipping if not $25), at Autozone for the same quality you'll pay about 30% more. At Advanced Auto you may pay about 50% more but then be able to use a 30% to 40% off coupon. YMMV.
That's about $100 for parts alone on the front, from the lowest cost place for midrange parts. If it has drum brakes in back, they tend to need done half as often if that and drums themselves, seldom need replaced until after 200K mi. (or less with aggressive driving or already replaced with inferior to OEM, aftermarket drums).
$50 brake job is too good to be true for an older midsized sedan. Either it's a new place trying to gain customers and eating a loss to do so (and even then using low quality pads and turning the rotors at most), or severely cutting corners and may easily find *some* reason why it's going to cost more, once they have you at their mercy.
Then again, you can go to a place that quoted $200 and find out that they want to replace more at addt'l cost to you too. Sometimes they're being honest about that, but sometimes not.