I was talking with a customer the other day about cost vs. value in gunsmithing.  We were trying to determine whether or not he should add a sight to a S&W 442.  This particular gun did not have a pinned front sight.  The sight ramp was integral to the barrel. Normally installing the Big Dot sights is $100 including the sights.  However, if you have to mill them, the cost goes to $150.  Because it was a 442 (blued gun) we now have to...