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  2. Professional Sports Authenticator - Wikipedia

    en.wikipedia.org/wiki/Professional_Sports...

    As a result of these concerns, the adoption of third-party grading companies became progressively more widespread. PSA was able to benefit from the dot-com boom, which had eBay prevail as an online auction website. As a result, a larger number of individuals were able to participate in the sports card collecting and trading hobby.

  3. Collectors Universe - Wikipedia

    en.wikipedia.org/wiki/Collectors_Universe

    Collectors Universe Inc. is an American company formed in 1986, now based in Santa Ana, California, which provides third-party authentication and grading services to collectors, retail buyers and sellers of collectibles. Its authentication services focus on coins, trading cards, sports memorabilia, and autographs.

  4. List of most expensive sports cards - Wikipedia

    en.wikipedia.org/wiki/List_of_most_expensive...

    Cards are evaluated by third-party services, most often Professional Sports Authenticator (PSA), Beckett Grading Services (BGS) and Sportscard Guaranty (SGC), and given a grade on a ten-point scale based on condition. [5] The images below do not necessarily represent the individual specimen sold but are representative of the given cards.

  5. PSA Reopens All Card Authentication and Grading Services - AOL

    www.aol.com/news/psa-reopens-card-authentication...

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  6. Numismatic Guaranty Company - Wikipedia

    en.wikipedia.org/wiki/Numismatic_Guaranty_Company

    Numismatic Guaranty Company (NGC) is an international third-party coin grading and certification service based in Sarasota, Florida. It has certified more than 60 million coins. NGC certification consists of authentication, grading, attribution, and encapsulation in clear plastic holders.

  7. Professional Coin Grading Service - Wikipedia

    en.wikipedia.org/wiki/Professional_Coin_Grading...

    Professional Coin Grading Service (PCGS) is an American third-party coin grading, authentication, attribution, and encapsulation service founded in 1985. The intent of its seven founding dealers, including the firm's former president David Hall, was to standardize grading.

  8. Alan Rosen - Wikipedia

    en.wikipedia.org/wiki/Alan_Rosen

    Alan "Mr. Mint" Rosen (c. 1943 – January 24, 2013) was an American sports collectibles dealer who was especially active in the 1980s and 1990s. [1] He advertised heavily and was a fixture at card conventions.

  9. PSA Certified - Wikipedia

    en.wikipedia.org/wiki/PSA_Certified

    The PSA Certified program seeks to address and reduce fragmentation in the IoT product manufacturing and development sectors. It supports the creation of system-on-chips (SoCs) that incorporate a PSA Root of Trust (PSA-RoT), a security component accessible to software platforms and original equipment manufacturers (OEMs).