S&W ownership and collecting is long overdue for a compiling of information of actual auction and dealer sales that reflects current and accurate sales activity.
It would seem that something along the lines of the Kelley Blue Book or the National Auto Dealers Association (NADA) regional and quarterly publications is the answer. Information could be compiled and voluntarily submitted from actual sales at all large firearms auctions and large gun dealers.
What is glaringly deficient today is the lack of adequate sampling numbers of guns and models being sold. Basing a value on one or two guns seen at local gun shops or sold at internet auction is almost laughable in its determination of gun and model values throughout various parts of the country.
On any particular month I doubt if anyone on this or any other website has an opportunity to see more than two or three S&W's of any model, barrel length, finish or condition sell in numbers large enough to make even a "ball park" estimate of what all guns in its particular condition and category are worth.
Although many people come to sites like this to ask what their particular gun is worth, throwing that question out to a group of people who may or may not be qualified to answer seems risky and somewhat inconclusive to a long time collectors like me.
I don't criticize those who attempt to provide them some kind of answer. People requesting info, however, should realize some "appraisals" could be self-serving when we see "low-ball" quotes from those seeking to buy or manipulate lower prices or "high-ball" quotes from those seeking to sell or manipulate higher prices for guns they have a particular interest in selling....
Just sayin'