Hello everyone. I have a 686 no dash 4in gun. The 4 shoots fine, but I personally prefer a 6in gun, so I asked a lgs about trading for a 6 in. They didn't have a used no lock gun in Stock, but offered to buy my gun and call if/when they get a 6inch in. They offered 475 for trade on my gun. I think that's a little low. Am I way off? Are the 6 inch guns more valuable/desireable than the 4 inch? Thanks to all that reply