Only 10 of the Bulls legend’s 1997-98 Precious Metal Gems (PMG) Green cards were made as insert cards for Skybox’s Metal Universe packs, and this card — No. 6 of 10 — is one of only three Jordan PMG Greens some experts believe to be in circulation. Only the No. 6 has been authenticated and graded by the Professional Sports Authenticator (PSA) service.