PRIVATE PARTY HD2500 , F250 , or 2500 .
Gas is OK on your budget.
2500/F250 has bigger brakes and heavier components . So their service life is longer if used identically to a half ton .
You want to visit the original owner with his pickup for sale and see how he takes care of his Stuff.
This requires considerable effort on your part .
You will need to scour craigslist and the ads each day diligently .
Be prepared to buy on the spot after you have looked at 4 or 5 .
The best buys sell to the first looker .
Be that person .
I'm a GMC diesel owner . I could not be happier .
But condition matters more than brand .
I would stoop to a F_rd or a Do_ge if the condition was right .