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
TREK X CALIBER 6 2015 - YouTube
Stolen 2015 Trek X-Caliber 6
2014 Trek X-Caliber 6
2015 X-Caliber 6 - Bike Archive - Trek Bicycle
Trek - X-Caliber 6 (used) – IttyBittyBikeShop
2014 Trek X-Caliber 6
Initial Thoughts and experiences: Trek 2014 X-Caliber 6 29er | Mountain Bike Reviews Forum