2021 Peterbilt 579 X15 — Used Market Prices & Trends

The 2021 Peterbilt 579 powered by the X15 is currently represented by 306 active listings on TruckRadar, with a median asking price of $59,900 and median odometer reading of 410,530 miles. Over the past 90 days, asking prices have moved up 1.6%. 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 2021 579 inventory sit in Missouri, Texas, and North Carolina, where regional pricing ranges from $53,249 to $64,400. Common transmission pairings include EEO-16F112C12 and Eaton Automated. The 2021 579 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 389 and 567. Pricing reflects active asking prices from verified dealers and is not a substitute for a formal appraisal.

2021 Peterbilt 579 X15 — Frequently Asked Questions