system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why are pickup trucks, even ones with more than 100k miles, so expensive?

I understand there is a demand because contractors need them to run their businesses, but is that all? I'm in the market for a truck and a new, mid-sized, 4wd pickup is $30K minimum.
gpt
Pickups are used heavily by small businesses, small businesses don't tend to upgrade until they have to - in this case "until they have to" usually means "until it's not economical to repair the truck"

Unlike with a family car, which you may change every 2-5 years, a company will generally buy a pickup either new or nearly new, then just run it until it doesn't go any more... it's only being used to haul stuff around, there's no upgrade requirement: it either runs or doesn't, and by the time it doesn't it's usually scrap.

This means there aren't many running high mileage trucks up for sale. Combine this with good demand for used trucks (because they're useful enough that at $3000, everyone would just get one) and the price goes up.

In short: lots of people want a truck, and nobody sells theirs once they have it. Low supply and high demand pushes prices up.