2021 Peterbilt 579 X15E — Used Market Prices & Trends

The 2021 Peterbilt 579 powered by the X15E is currently represented by 10 active listings on TruckRadar, with a median asking price of $55,000 and median odometer reading of 414,583 miles. Over the past 90 days, asking prices have remained stable. Pricing trends are consistent with normal market turnover for this configuration. Most units listed are configured as conventional cab with tandem rear axle (6x4) drivetrains. Geographically, the largest concentrations of 2021 579 inventory sit in Montana, Utah, and Idaho, where regional pricing ranges from $45,500 to $56,900. Common transmission pairings include manual and automated options. 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 567 and 389. Pricing reflects active asking prices from verified dealers and is not a substitute for a formal appraisal.

2021 Peterbilt 579 X15E — Frequently Asked Questions