You misunderstand my comment. I agree with doing your due diligence and caveat emptor, etc. Whether you’re buying a shotgun or a used car, have it checked out by someone who knows what they’re doing if you don’t have that expertise. British proof laws give the buyer in the UK some assurance that what is being bought at auction, for instance, has an acceptable degree of safety. An industry association might be able to do it here, but I wouldn’t trust any governmental agency to do it; Uncle Sam has trouble delivering the mail.