Is this autograph authentic?

[Misa-chan]

Even if they are legit, I don't think it's a good idea to buy them. Buying it means that you are showing support for all these sellers who are trying to gain profits from ayu's hospitality, like that couple of idol-shop owners who kept hounding ayu to sign tons of stuff when she was in LA, just to turn around and sell it for hundreds of dollars online...