I hope this doesn't sell for nearly that high. The buyer will be right out wasting their money. The current highest interested bid for an unrestored Kishsaver seems to be
~$260. Maybe in five to ten years when it's become a legend again,
maybe it will get close to $500. Maybe a solid and well built Xtant with a fully custom case could run at these prices, but not an unmodified, unrestored board that's still in need of a lot of love.
That said, how rare are Kishsavers in the grand scheme of things? Have we unearthed almost all of them or are there hundreds left to be found? Model F AT are going for $200-250 regularly on eBay. Is a Kishsaver really worth the same as an AT in the current market?