A coworker of mine is looking to sell me his S&W 19-3 6". I don't really know too much it. It will be my first revolver chambered above 22lr. Is there anything I should look for in this gun? I had a chance to hold it and it looks solid with no noticeable flaws. also, what is a decent value for it. I don't want to screw him over because he is my friend, but on the other hand I don't want to overpay. he was asking 600. Any input will be much appreciated. Thanks guys