Kansas tends to be pretty shrug-ish about such things, but honestly, I doubt I'd sell it anyway. I might give it away, with a clear understanding that I have no idea if it works or what it would take to make it work, that you're on your own, and I really don't recommend even looking at it unless you know what you're doing.
There's also a good possibility I'll resort to the Large Hammer method of extraction and there won't be much left
I am kinda surprised that a one-line comment about the heater has attracted so much more response and interest than that new upholstery, though.