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2. GreatCollections - Wikipedia

   en.wikipedia.org/wiki/GreatCollections

   The GreatCollections.com website launched in late 2010, facilitating the sale and purchase of coins and paper money in online auctions. [6] It has since become well known for auctioning rare examples of American currency, [7][8] such as the Cigarra Collection, [9] and a collection of Indian Head nickels that sold for over $500,000. [10]

3. 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. NGC is a subsidiary of Certified Collectibles Group (CCG ...

4. 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. [4][5] The firm has divisions in Europe and Asia, and is owned by parent ...

5. 6 Rare Coins That Can Be Sold Online

   www.aol.com/finance/6-rare-coins-sold-online...

   In the pre-internet era, information about rare coins was hard to come by unless... Skip to main content. Sign in. Mail. 24/7 Help. For premium support please call: 800-290-4726 more ways to ...

6. Rare gold Roman coin sold at auction for nearly $785,000

   www.aol.com/article/2014/09/24/rare-gold-roman...

   A Roman gold coin, minted more than 2,000 years ago, depicting the first and greatest emperor of the Roman Empire, Augustus Rare gold Roman coin sold at auction for nearly $785,000 Skip to main ...

7. James L. Halperin - Wikipedia

   en.wikipedia.org/wiki/James_L._Halperin

   James L. Halperin (born October 31, 1952) is an American businessman and author, who is the co-founder and co-chairman of Heritage Auctions, now the largest American auction house with 2022 sales in excess of $1.45 billion. [1] In 1985 Halperin authored a text on grading coins, How to Grade U.S. Coins, upon which the grading standards of the ...