[perezfan]

Agree...

The answer depends upon a few things...

A. Who signed it, and how rare/valuable is the signature?
B. What is the nature of the item, and value of the item prior to its being signed?
C. Does the signature enhance or detract from the aesthetics and overall appearance of the item?

In your case, I think it could go either way. Matthews is not a rare signature, so there is no clear-cut answer. It just depends upon whether the purchaser prefers it autographed or not. Since Matthews is deceased, I would personally prefer the autographed version. He has a nice signature, and is featured on the cover.

But a Magazine/Periodical "purist" might not touch the autographed version. So I think your example can easily go either way.