Worth it? This is a Trek x-caliber 6 from 2016. Seller is asking $675. Trek seems to have discontinued the 6 and that model now starts at 7. : r/whichbike
2016 Trek X Caliber - Bicycle Details - BicycleBlueBook.com
X-Caliber 8 | Trek Bikes
How Did The Track Veteran Trek X-Caliber 6 Conquer You?