Hey all, stopped in to the LGS, and they had a used Smith and Wesson 640. I was looking at maybe getting the 640, an SP101, or a Ruger LCR. Anyone have any experience with the 640? I have never bought a used revolver either, are there any particular things to check out? Overall it looks like its in really good shape. I saw someone once mention a sticky about buying used revolvers, but couldn't find it. Price on the 640 was at 499, not sure if I should pull the trigger on it or not. Help!