2021 Kenworth T680 ISX / X15 — Used Market Prices & Trends

The 2021 Kenworth T680 powered by the ISX / X15 is currently represented by 32 active listings on TruckRadar, with a median asking price of $46,900 and median odometer reading of 433,500 miles. Over the past 90 days, asking prices have moved down 10.7%. Seasonal softening in the used truck market tends to occur as fleets delay purchasing decisions during slower freight periods. Most units listed are configured as conventional cab with tandem rear axle (6x4) drivetrains. Geographically, the largest concentrations of 2021 T680 inventory sit in Texas, Wisconsin, and Tennessee, where regional pricing ranges from $41,900 to $54,900. Common transmission pairings include manual and automated options. The 2021 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.

2021 Kenworth T680 ISX / X15 — Frequently Asked Questions