Woulda bought that in a heartbeat. Fantastic deal. I too don't have a .40 S&W, but for the price I certainly wouldn't mind.
Police carry trade ins are awesome deals. My LGS cut me a very good deal on a Gen 3 21 that belonged to a cop. It was his personal carry piece that he carried off duty. He liked to keep it like-for-like when it came to his guns on and off the clock (dunno if the caliber is the same or not). The department switched over to a different gun, so he traded away his Glock to buy one that he was going to used to using again.
A little holster wear, some upgraded sights (score!), and some grip tape on the frame (which is always too aggressive for my liking, but peels right off), and I was set. I could tell he ran it through its paces as the mags had the signs of dropping freely onto the range floor but certainly no worse for wear.
The nice thing about Glocks, they are so damn boring that they usually come up for a good deal. Soulless, unsexy, workhorses.