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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.
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.
Standish served as Vice President of Professional Sports Authenticator (PSA) and launched PSA/DNA First autograph Sammy Sosa- authentication from 1996 to 2001. During that time, Standish authenticated a number of high-profile sports items including Mark McGwire’s 70th home run ball [13] and Henry Aaron’s 715th home run bat and ball. [14]
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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.
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.
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.