A way to keep it in your family would be to find a museum that would like to take it on loan.
Thanks. I'm considering donating it to a museum as sort of a last resort. There's a steam and gas engine museum just a few miles from where Empire Garden Tractor had their plant, so it's sort of part of the local history. I would rather do that than just letting it go for a few bucks. There's still a few remnants of some old concrete storage tanks at the old plant site but for the most part it's a golf driving range now. Nobody in the area under the age of 80 has ever heard Empire Garden Tractor, even though they were a major local business. The only reason I know about it is that when I was a kid, every time we would drive by the place my dad would say "that's where Garden Tractor was" It used to be in the middle of farmers fields, now it's surrounded by urban sprawl.
It's something I'd definitely consider.