I couldn't see any M logos on the M3 parts in their photos. It says made by TRW?
Also, had a look at the brakes section and the 'OEM 3 series' pads seem way too cheap.
The cheapest place I could find was ECS for $550ish.
BMW 135i N54 TWIN TURBO
Quarter Mile firstname.lastname@example.org - Street Tyres
Queensland Raceway Sprint 1:01:22 - Street Tyres
Queensland Raceway Clubman 1:04:74 - Street Tyres
Lakeside Raceway 1:03:97 - Street Tyres