I have yet to see a truely used police gun. Most have surface wear and that about it.[/QUOTE]

I have, several years ago I bought a LE trade in M&P 9L from Bud's that was supposed to be in excellent condition, and all the reviews said so, but I must have gotten the one bad apple. It had the most external and internal wear of any M&P that I have seen to date.
To Bud's credit, they let me return it, they even prepaid the return frieght.