Fraud? & Phony?

There is a steel die/hand stamp manufacturer in the state of New York that I came across this week and became very disturbed after talking to the owner. The company makes steel dies for hand stamping metal. During my conversation we talked a little about the types of stampings on various manufacturers of guns specifically lugers. I was appalled to find out this company is doing a booming business in the manufacture of hand dies for stamping proofs on lugers. They will make any stamp I want and says that currently he is doing business with an individual in the Chicago and Florida area making reproduction stamps for these individuals for luger rework. LUGER REWORK or is this LUGER lets fake the rework and call it original. I can tell you that I have not slept very well since, thinking I may have in my safe one of those originals that wasn't original until someone reworked it into an original. What's going on guys and who is doing the fraudulent work? I hope I never buy one and find out about it because I will be madder than all blazes. Has this happened to anyone and how do we protect ourselves from these thieves? Feedback guys?