The cert looks legit (in that it has the correct everything on it - including the colors etc of the wording on his forms and the outside border being two colors--black and red combined) Rogers sig looks legit as well. However - it's pretty easy to take a legit cert - scan it and photoshop in a new pic and typing - so you would need to absolutely email him to be sure he authenticated it. His email address is at the bottom of this page: http://rogerepperson.com/index.html
Where did you find this? There are a few sellers on ebay that photoshop legit certificates and attach them to bogus items. Looking at the other offerings would be the tip off.
You might be better off going through his website,he doesn't come here much. Shame he doesn't for all the free advertising we give him!