Up for auction is Return of Superman Collection Issues.  Signed by artists Jon Bogdanove, Brett Breeding, Jackson Gruice, Tom Grummett and Dan Jurgens. All are signed, with a certificate of authenticity from Dynamic Forces Inc. All of them are still in the original Pro Grade Authentic sleeves and have never been taken out of the sleeves. The COA does have a crease on it. I have no experience grading comics. I believe they would all rank 9.2 or higher.