Shimano Ultegra FC-R8100 12s Crank set with 4iiii power on the left side, 172.5mm.
This came on my "new" Canyon that I got 1.5 years ago. I rode with it about 3 times, then I switched to a smaller crank length and it's been in a box ever since. Best I can tell the left side 4iiii crank arm sells for about $450 and the ultegra front chain ring/crank set sells for about $300. Selling both for $350 OBO.
Please contact me at kkadous@gmail.com if interested.
Cross-posted