The more a gun is handled the more bluing will probably be worn on edges etc. In spite of owning my XD service black finish, it still looks pretty new. A carry weapon will show wear after awhile for obvious reasons. Since appearance is an important factor I don't know why a gun shop would allow it to happen to new merchandise. I was in a small but very friendly shop Friday, looking at Kimbers. All new, and everyone looked like they'd been bouncing around in my trunk. The guy said that's because every gun was removed from the display nightly for secure storage. I suggest casters on the cases so the whole display could be secured instead of just the gun.
I don't care what the story is, if I buy a new gun, I want it to look like new! BTW, stainless guns do the same thing, it's just not as noticeable.