Is 550 a good price for this 2018 X-caliber 7 29" it has some scratches and would be my first mountain bike for some light trail riding and street use. Considering this,
Trek X-Caliber 8 review - BikeRadar
Trek X-Caliber 7 Mountain Bike (19.5”) BRAND NEW | eBay
X-Caliber 7 - Trek Bikes
Slightly used Trek X-Caliber 7 for $600 or Slightly used Trek Marlin 5 XS for $480 : r/MTB