Prices For Used Medium And Heavy Duty Vehicles Data Set?

I’m looking for a data set that aggregates the sell price for used medium and heavy duty vehicles in the U.S.
For example, I’d like like a data set of used box trucks with attributes (selling price, year, mileage).
Sites like commercial truck trader display trucks that are actively being sold but there is no seamless way of aggregating this information into a data set.
I’ve been unable to find a data set that matches these preferences. What are my options?

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