like everything else, it's worth what someone will pay. last year i saw just the cab of an early 40's cabover at a yard sale for $1000.00.
i thought that was a bit high, but it was in great shape. it sold, without haggling.
i have a 50 1 ton, and a 49 1 1/2 ton that run, and were given to me to get out of the p.o.'s yard. just got a line on a complete 59 1 1/2 ton, low miles with a grain bed and good hoist for a couple of hundred.
like i said, it depends.
i figure a good guess would be in the 2 grand range, maybe