A lot of these trucks just get crushed for scrap or sell at scrap prices. The people that buy them buy them because they love them, not all that much demand. Compared to 1/2 tons they are more expensive and complicated to restore and tire prices alone will eat your lunch.
That said one of these days I'd like a COE and if you lived up the road frome me I'd be kicking the tires and asking ?"How much?"