SRAM - Omnium Crankset w/ GXP Bottom Bracket (Black)

From website listing: The Omnium track crankset is the first external bearing track crank in the world. Designed for world-class track racing, the Omnium features our strongest and stiffest alloy; 7050-T6. The full 5mm thick 7075-T6 chainring was developed for use only with 1/2 x 1/8 chains. Reports from our test riders suggest that this is the stiffest crank they had ever ridden. Bottom Bracket Included (Compatible with SRAM GXP Bottom Bracket only) Link - https://www.statebicycle.com/collections/drivetrain/products/sram-omnium-crankset-w-gxp-bottom-bracket Crank Arm length – 165mm Bottom Bracket – SRAM GXP (English / 68) Note – NOT selling with chainring or bolts WEIGHT: 825g Used for a day on All City Big Block (setup as single speed – 110 spindle length) but quickly decided enjoyed square taper bottom bracket and different crank arms so I am selling. Retail - $469 (but that is for completely unused and includes chain ring and bolts) so seeking $300