Isn't the point of getting an autograph to get it in person? Basically saying, hey I am a fan and I met one of my favorite players.
Nothing is worse than seeing someones "Steelers Room" that has 100% purchased autographs, most of which were not bought from a reputable dealer and are usually fake.
Thats why I NEVER buy autographed items. The only exception I have for this is if I need an autograph to finish my collection and i'll send it to a http://www.csashows.com/
show. I have been to a few of these shows in person so I know its legit.