FWIW, I once got a Deuce McCalister signed mini helmet at saints training camp in person one year, then took it to trade at a sports memorabilia show one year, and at one of the booths was one of these liscensed professionalist who determained whether autographs were fake or real, and the guy told me it was fake. I ended up getting $20 for the helmet at another booth, but I thought it was funny.