I have a few smaller framed glocks. 19, 23, 27. Would like a full framed 40. I like the indentations and finger grips and think I want the frame rail. I wouldn't mind a police trade in. Not much for new. Let someone else put in the first scratch and take some depreciation. Hoping for one in the 350-400 dollar range. Are there "bad" lots or models out there?