Dual Autographed "Buyback" 2018 Upper Deck Marvel Studios: The First Ten Years Guardians of the Galaxy autographed by both Lee Pace as "Ronan" and Zoe Saldana as "Gamora" at the 2019 ACE Comic Con Seattle and authenticated by James Spence Authenticaton via their JSA WPP (Witnessed Protection Program). All signed items come with JSA WPP Certificate Of Authenticity with matching serial-numbered sticker on card.