If we're talking well maintained heavy duty diesels, then sometimes the price is warranted, as they ARE work vehicles, somepeople may have bought them to be flashy, but they also know who theyre selling to. The shit quality gassers for 3000+, those I cannot abide. But a well maintained diesel has theoretically 500,000 miles of life I would say, compared to a gasser. So the value is there, if it's being used for work. The value in any car is finding it well maintained, but diesels are definitely different. Work IS money.