I own a S&W 640 357 Mag with the 2.25 inch barrel in excellent condition, with the Crimson Trace laser grips. This gun is excellent for what it is, but I think I may need to sell one of my guns and this is the least fired that I own. What would be a fair asking price? A local gun shop offered me $250 which I thought was a joke and would not consider selling it at that low price.