These prices dont surprise me, nrma is a chain store now (so is there driving school) just cashing in on what remains of the reputation they had 20 years ago when they where professionals.
i will add though that depending where nrma sorce parts the price on the brakes isnt far off correct if they are using decent dba rotors (doubt they are) but supercheap quaoted me 250 a corner for 4000 series..Repco is cheaper for F*** sake