I just bought a used M&P 40 from a LEO friend. He was issued a new one by the department & was given the opportunity to buy his old one back. It's 2 years old & in great shape with no signs of wear inside or out. He paid $370 for it & that's what he sold it to me for. It has the old style trigger on it but still worlds better than my Sigma 40VE which to me isn't all that bad. In both guns the triggers smoothed out very well with live & dry firing.
I'm still waiting for my M&P 40C to be delivered. It's been 6 months already but the price was great.
Now to hit the range ASAP & put it through it's paces. I'll have to remember to save some ammo for testing the new 40C when it ever gets here.