David K's Groups (2)

  • Authentication and Forgery Alert

    438 members Latest Activity: Jun 22

    Discuss authentication issues within the industry, including but not limited to 3rd party authentication. It's also a "clearing house" for…

  • Tricks of the Trade

    131 members Latest Activity: Sep 28, 2023 This group offers helpful tips for maximizing your collecting experience! This group is geared towards in-person autograph collecting. Posts in…

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