I own 2 Dan Wessons. Model 15 and 15-2. Yours is a model 15-2, the model 15 has rear sight notch in frame. That revolver is in nice condition but with no original box and any extra barrels (they all did not come with more than one barrel) that will "hurt" you on price. I see them sold on online gun auctions often and fetch around $450-$650 in much less condition than yours. I could easily see yours going for around $700-$850 but theres commission and all that also.