PeteM, What's a top model AJ Aubrey worth?
I came across one that was heavily period engraved, fine Damascus barrels, but the entire gun was covered in a patination of fine rust. He wanted $700.00, which I felt was much too high.
I didn't want the work. And I knew little about them.
A hammer M97 or a hammerless M58 with some case coloring and in excellent condition will usually go for $1,200 or more. If it a special grade (reported but I have never even seen pictures) or a 20ga (I only know of 2 to exist currently) and the price would double or triple. For the 1st gun made (currently owned by one of the board members here) with deep relief engraving I would guess at least $5,000.
Most of the top graded guns will never come to market. At least that is my impression from countless contacts with owners. So many have been passed down through the family, they never intend to sell.
Pete