2017 GMC Sierra 1500 SLE

Owners selling privately get 16% to 23% less than dealers ask for the same trim, year and mileage. The low end is how the big pricing guides value a private sale (what buyers pay dealers, less a private-party discount); the high end is what private sellers’ asking prices and private-party sales show. A trade-in usually fetches less still.

Priced as SLE: 12 of the 13 cars we’ve seen with this VIN pattern are. Median of the 40 asking prices of this trim & year closest in mileage (155k mi–216k mi), each moved to 189k mi ($13,969 nationally), its history (2+ accidents −3.1%) and where it is (Texas −0.2%).

Accident, owner and title flags as reported in listings — not a full vehicle history report.