These posts surface every so often but I don't believe that any one on here bought a used gun sold as new from a dealer.
Yes, probably most of us have not knowingly been involved in a case of dealer fraud. This is true. If the gun looked new, or as we expected it should look for a gun that has been test fired at the factory only, we bought it as new and never looked back.
I know most dealers aren't apt to let you field strip a new gun in their store and are not apt to do it for you either. Too many folks end up damaging the finish on guns, usually during the reassembly process, to allow customers to strip them down.