I just picked up a S&W 5 screw .38 serial # 342xxx in trade. I think I made a pretty good deal (paid $175 last week for the pistol I traded for this one). I was trying to find out when it was made and approximate value. The guy I got it from (a retired deputy sheriff who wanted ALL my info) said it was worth $600+ to a collector and $400+ to a shooter, but then why trade for the gun I was only asking $225 for (a like-new Keltec P11)? Condition is pretty good for a gun that is that old. Blueing is intact (re-blued?), no real pitting, wood grips are great on one side and a little gouging on the other side). Any help? Thanks.