Lucast

Hey guys and girls I'm trying to figure out wether or not I should buy a 1988 3500 350 with the manual transmission. It has 200000 on it and has been used to haul firewood and a gooseneck ( I'm assuming the gooseneck because there is a hitch for one in the bed)
I have a daily driver and this would only be used as a play/work truck for hauling and towing.
The main concerns that I have are as follows:
How long will it last?
I know gas won't be great but what should I expect as far as mpg?
Resale value?
How much is it worth?


Thanks in advance