It seems about $100 high. The E53 is advertised at $474 CDN for front pads, rotors, and sensor at my dealer in Vancouver, and $553 CDN for the E60. They don't have a special on for the E70.

I did rotors at that mileage, and I would do them again (ex mechanic here, I did them myself at home). They aren't worn out at this mileage, but it helps avoid noise problems afterwards. My dealer is advertising pads only for the E60 at $261. They don't recommend it, but they will likely do it if you insist. If the brakes are noisy afterwards, fixing it is likely to be on your dime.

__________________
2007 X3 3.0si, 6 MT, Premium, White

Retired:
2008 535i, 6 MT, M Sport, Premium, Space Grey
2003 X5 3.0 Steptronic, Premium, Titanium Silver
2002 325xi 5 MT, Steel Grey
2004 Z4 3.0 Premium, Sport, SMG, Maldives Blue