17: Colt Government Model MKIV Series 70 in 45 ACP with 5" Barrel. This semi-auto 1911 pistol features a deep blued finish, fixed sights, checkered wood grips with the Colt medallion, a grip safety, a manual thumb safety and an exposed hammer. These guns are becoming quite collectable and this one is in very good condition. Estimated Value: Low: $1,300 High: $1,600