I am helping a friend sell some stuff and they have a cast signed MI3  poster(figured out the HTML editor tab:p)

Notables are Cruise, Hoffman, Fishburne, Pegg

I am skeptical of the authenticity, since the CoA came from grandstandonline. I have had one other person take a look and they are skeptical as well. However, he did say the Cruise sig does look legit. 

Any help on this would be appreciated.

Thanks!