I think for a local face to face sale where there are no additional fees you could get $425 for the gun but you have to wait for the right buyer. I just paid that much for a 3913 in about the same condition as your 4013. Those of us who know S&W's know how good the guns are, but the general shooting public is not as aware so the guns will not sell as fast as Glocks or the more recent polymer guns.

Bill