I recently purchased a near-mint Model 36 made in 1970 and was purchased new by my friend's father-in-law in 1974. Of course it has the pinned-barrel and is a square-butt model. Appears to have been shot only a couple of times (no more than 15rnds). Was wondering what kind of value i should place on it? 99% bluing intact with the original grips. No box (Dang). I know this pistol most likely wasn't +P rated so i've kept it loaded with normal velocity SilverTips. Funny that my aluminum-framed 638 Bodyguard is +P rated...