No doubt there are hopes nostalgia will be valued over function. Nonetheless, these were only simple tack & glue beach boats, not exactly Mystic Seaport Museum pieces. Still, it would make a great conversation piece for some Sunfish shop.
The earliest Sailfish were built from plans, not a kit (the uniformity of the kit came later) so there was home-builder latitude in construction. This boat appears to have many Sailfish characteristics, but there are also a few rogue elements. Anyone bidding on an original '40s Sailfish needs to have done their homework well.
That is a more realistic asking price than others I've seen, but the final word still lies with the buyer since they determine actual market value ... not the seller.