Hi, BillK. E-mail me at drockerman100@gmail.com and we can continue this discussion.

Yes, it is a model I developed for my own edification in values. Brit and Continental gun values seemed a jumble to me. After my research, I found the model gives a pretty fair estimate of auction prices. I am happy to share for personal use.

The three factors define five sheets of 9 by 9 matrices (405 pigeon holes of value). Once you assign the three factors, you look up a value in the 5 sheets. You can also reverse engineer the value by looking up similar "ask" prices and seeing if the factors indicated make sense.

Use of the charts will sorta "jump-start" your intuitive valuation sense --- at least it did for me.

Drop me a note.

DDA