I need to sell one of my pistols in order to fund a utility trailer that I want to buy, but I'm not having any luck really finding an accurate price. It's a Smith & Wesson Model 66-5 K-Frame .357 2½" barrel. I've looked all over Gunbroker, GunsAmerica, etc., and the prices vary quite a bit. Seems that the 4" model is the most widely available/popular. Any help would be much appreciated! Thanks!