Already been there, and done that.
Looks like a nice clean Rokon, if that is what you are looking for. They are great little bikes for what they were designed to do - which is dragging dead animals out of the woods. They are agonizingly slow and really would not be not much fun at all to ride on the single track trails that you and Betty do so well on.
I liked the novelty of owning one, much more than I enjoyed the few times that I rode mine.