see link:
http://www.net54baseball.com/showthread.php?t=217374
Many long time game used collector would argue this. With all resources available with modern day technology you are better off to do the "homework" and always question those that are in the biz that are selling for profit. ALWAYS. Remember LOA's and COA's are not even worth the paper its printed on except to those that author them and especially after the deal done. Perfect 10 score should be NOTHING less than anything that can be proven beyond a reasonable doubt that the item is the real thing. All the scientific mumbo jumbo is nothing more than that unless it can be proven to that fact. Network with game used collectors and seek and ask advice-many will be there to answer the questions you seek.