2026 Kenworth T680 ISX / X15 — Used Market Prices & Trends

The 2026 Kenworth T680 powered by the ISX / X15 is currently represented by 13 active listings on TruckRadar, with a median asking price of $196,800 and median odometer reading of N/A miles. Over the past 90 days, asking prices have moved up 1.8%. Prices have held steady, reflecting balanced supply and demand for this configuration in the current market. Most units listed are configured as conventional cab with tandem rear axle (6x4) drivetrains. Geographically, the largest concentrations of 2026 T680 inventory sit in Ohio, Texas, and Wisconsin, where regional pricing ranges from $179,900 to $229,950. Common transmission pairings include manual and automated options. The 2026 T680 typically appears in dealer inventory for an average of 30 to 60 days before sale, based on TruckRadar listing turnover data. Buyers comparing this configuration often also evaluate the T880 and W900. Pricing reflects active asking prices from verified dealers and is not a substitute for a formal appraisal.

2026 Kenworth T680 ISX / X15 — Frequently Asked Questions