I replaced the front brake pads on our E70 recently, got quoted for around $700 to $800 at the dealer.

Ended up getting a pair aftermarket Textar (German OEM brand) pads, discs + sensors, for less than $300!

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'07 X5 3.0d - Black Sapphire Metallic / Camel interior
Specs: Sport pack, Executive, 7 Seats, OEM 336, Hifi
Mods: Aero Kits, Titanium grilles, 4.8i exhaust, Tinted, ///M Footrest, OEM Sport pedals, OEM Rubber mats, OEM Sunshades, LCI Taillights