15 years ago we were buying every broken break action 410 we could find at $50. We would epoxy and pin a broken stock, or make an new firing pin.
But those all had exposed hammers.
The inherit functionality of an enclosed hammer Sav 219 or Sav 220 is higher.
Most people do not see that, and so low priced 219s and 220s happen..... locally.
My guess is that the front half of a 410 gauge Sav 220 would go for $325 on ebay.