Update: Fronts have been sold separately. Rears are still available - asking for $100.
Selling used BMW brakes from my 2017 F30 340i. The fronts are four-piston gray Brembo calipers that take a 340x30mm rotor. Rears are single piston calipers that take a 330x20mm rotor.
All calipers come with working clips and pins to hold the brake pads in, stock brake lines, front and rear brake pad sensors that have not been tripped. Sensors are still working great. Can also include the old mounting bolts if you'd like - however, most recommend using a set of new bolts.
I will also keep the stock brake pads in as they have plenty of life left. According to my BMW the rears have about 5,000 miles left and the fronts about 15,000 miles. But if you don't want them I can also remove them.