Yes or No to grade a Chrystal Charizard with authograph

I am not into the cards with autograph thing, but I do own a few.
Is an autograph of the artist who designed the card go up in value? Even if the card is a PSA6 (or less, not that good condition).

Mine is Shining Charizard and because it will cost me around 200 Euro to have it graded, I need to know if it’s worth it.

Probably, is it signed by yoshida?

www.elitefourum.com/t/the-giant-professional-grading-thread/30930/1