YS709, sold new at Central Chevrolet, West Springfield, MA.
Converted cars did not retain there original engines and received 427's. Not all of them started out as 396's in 1967. There are known non converted cars that still retain their original (I dislike the term, but) "born with" engines.
Sellers like this typically price their cars higher than the market. Especially now with the "pandemic" buying frenzy. Many of the remaining cars do not have their Yenko installed engines and the prices are still through the roof. It's been quite a few years, but the last 67 Yenko I remember, sold for around 400k; NOM. That was an auction, no idea what private party sales are going for.