Don,
Is your system posted somewhere? No, but I share by email (you need Excel for the charts), or snail mail.
I have a nice little Army and Navy (Brand Value level three _ BV3) SLE built on a Webley screw grip action, 16 bore to boot. Nice rose and scroll and very nice wood (sounds like it could be an Original Quality grade two -OQ2,"A" grade). It will be nicely restored when placed for sale, great barrels reblacked and a proper oil finish, action original patena with crisp engraving (sounds like Current Condition level four - CC4). I have a price in mind but wonder what your system values it at.
Steve
So, BV3-OQ2-CC4 = $5,563 and the 16 bore will add, probably, around 1.5X, although, 16 bore has become somewhat "soft" recently.
This gun was also supplied in lower OQ grades.
Questions?
DDA