There were a total of 714 12 ga. and 450 20 ga. Two engraving patterns were offered, one with rose and scroll and the other a game scene. Funny thing is Browning denies that it ever offered the B-SS with anything but the rose and scroll.
The wood, checkering was better on the game scene guns and drop points were only on the game scene guns.
As Larry said the 20 ga. game scene guns must exist, but none has sufaced yet, I believe.
As for price now, who knows, as the list when new ws $1500.00. I would say the game scene 12 would be worth close to that. Look at the workmanship.