I bought a 06 GMC 3/4 ton extended cab turbo diesel maybe 10 years ago. Truck had 95k miles on it,and IIRC,I paid around 18 grand for it. Don't know about now with the diesel fuel prices through the roof,but a couple of years ago people where offering me more than I paid for it when I bought it.
BTW,the price of diesel fuel today is a scandal that everyone seems to be ignoring. Back when I bought my first diesel truck (a F-350 Xtended cab Ford) in the 70's,diesel fuel was around 18 cents a gallon and regular gas was around 31 cents a gallon.
In FACT,diesel fuel is a byproduct of creating gasoline. The gas companies used to burn it off to get rid of it. Now it is over $4 per gallon anywhere you buy it,and since damn never every product for sale in the country is delivered by diesel-burning 18 wheeler trucks,we are ALL being robbed.
Of course,if it were delivered in gasoline-powered trucks,it would cost even more,but that is besides the fact that diesel fuel is even more expensive than gasoline these days.