2021 Peterbilt 389 X15 — Used Market Prices & Trends

The 2021 Peterbilt 389 powered by the X15 is currently represented by 20 active listings on TruckRadar, with a median asking price of $149,900 and median odometer reading of 417,000 miles. Over the past 90 days, asking prices have moved up 10.7%. Demand for late-model commercial trucks typically strengthens as fleets refresh ahead of Q3 bid cycles and peak freight season. Most units listed are configured as conventional cab with tandem rear axle (6x4) drivetrains. Geographically, the largest concentrations of 2021 389 inventory sit in Texas, Oklahoma, and Illinois, where regional pricing ranges from $114,900 to $178,750. Common transmission pairings include RTLO18918B and 18 Speed. The 2021 389 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 579 and 567. Pricing reflects active asking prices from verified dealers and is not a substitute for a formal appraisal.

2021 Peterbilt 389 X15 — Frequently Asked Questions