A 76yr old, 1992 King of the road 5th, now what?

I certainly wouldn't have it repaired at shop rates to turn around and sell it. If you don't think it would sell (post repairs) for what it would cost to repair it, sell it as a fixer-upper. I'm sure there are plenty of folks with young healthy bodies who would jump at the chance to take it off your hands for a grand, then spend a month or two doing the repairs before they put it back on the road.