Quick Steps to Sell Coin Collectibles at Auction

David Mayfield is a Vice President at Heritage Auctions. David started collecting coins at the age of nine and has been trading at coin shows since he was ten years old. David became a full time coin dealer in the early 80's, and has been a regular on the national and international coin show circuit ever since. David came to work at Heritage Auctions in 1992, and since has had the pleasure of assisting thousands of collectors in building their collections and ultimately in helping them bring their collectible legacy to market. David oversees Heritage Auction's numismatic consignment division, and works with collectors and Consignment Directors across all of Heritage Auction's collectible categories.

Dustin Johnston joined the Heritage team in 1998 and has been active in nearly every aspect of the business. He was born and raised in Tucson, where he also attended the University of Arizona. Prior to joining Heritage, he won a number of literary and exhibiting awards from the ANA. Dustin also served as an Exhibit Judge and Numismatic Theater Speaker for the ANA. He oversees the management of the Currency division including consignment acquisitions, purchasing, cataloging, marketing, and inventory management. He is a life member of the American Numismatic Association and International Bank Note Society, and member of several other numismatic organizations including the Professional Numismatists Guild, Professional Currency Dealers Association, and Society of Paper Money Collectors. Currently, he serves as Vice President for the PCDA, and as a board member for both the PNG and the Anti-Counterfeiting Educational Foundation. Away from work, he enjoys married life, his two young kids, and WWI research related to the 364th Infantry.

Sarah Miller is Director of Numismatics at Heritage’s New York office and brings a lifelong passion for U.S. Coins. A student of numismatics since age 11, she first fell in love with U.S. coins and the history behind them while attending her first coin show. This led to a job in rare coins throughout high school and college, where she graduated Summa Cum Laude from North Central College in Naperville, Ill., with a degree in Finance and Economics. She amassed an impressive list of accomplishments during her studies. Sarah assists Heritage clients with their rare coin collections on a daily basis in addition to being a regular contributor to the Heritage Blog. She has twice appeared as a numismatic expert on CNN and is a current member of the American Numismatic Association and New York Numismatic Club. She also is a licensed Auctioneer in Texas, Florida, and New York City. In her spare time, she enjoys travel, taking ballet classes, knitting, and baking.  

Jacco is conversant in English, French, Dutch/Flemish and German.

Rich Adams is joining our Beverly Hills team from Utah, where he has lived for the majority of his life. He developed a passion for numismatics working as a jack-of-all-trades in a large coin shop – responsible for wholesale, appraisals, buying, grading, pricing, of US, World, Currency, Stamps, and an occasional diamond or pocket watch. For his own collection, Rich has a particular interest in world crowns, world gold, and large coppers, all having to do with colonialism and expansionism of the 19th Century and early 20th.  

Rich has recently returned to the professional numismatic world after a hiatus where he completed his Master’s degree in Public Administration. He has degrees in comparative religion, Spanish, and Portuguese. When not studying coins, he is regularly involved in the performing arts, having been a member of the Mormon Tabernacle choir and many musical theatre productions.  

Rich is thrilled to find a new home at Heritage!

An award-winning professional numismatist, Mark Borckardt has served the hobby full-time since 1980, and is currently a senior numismatist and cataloger with Heritage Auctions, a position he has held since June 2004. His interest in numismatics dates to the mid-1960s, and his experience in the business began part-time attending coin shows to buy and sell material about 1970.   

Borckardt began cataloging rare coins for auctions in 1989, and since that time he has handled 80 of the 100 top United States coins according to the itemization contained in 100 Greatest U.S. Coins by Jeff Garrett and Ron Guth. He is a life member of the American Numismatic Association, Early American Coppers, and the Numismatic Literary Guild, and a member of several other numismatic organizations including the American Numismatic Society, the Chicago Coin Club, the Central States Numismatic Society, the Civil War Token Society, and Florida United Numismatists. Borckardt was nominated and elected to membership in the Rittenhouse Society in 1994.   

With Heritage Auctions, Borckardt has cataloged 28 of the firm’s million-dollar coins. His numismatic experience includes important discoveries such as a new early half dollar variety, 1806 O-130 and rediscovery of the missing George O. Walton specimen of the 1913 Liberty nickel. Borckardt is co-author of Million Dollar Nickels, telling the story of that important numismatic event.  He is the editor of Walter Breen’s Encyclopedia of Early United States Cent, 1793-1814, earning the EAC Literary Award in 2001 and the NLG Book of the Year award that same year. He has also contributed substantially to many other numismatic reference works. In addition, Borckardt has penned many articles for The Numismatist, Penny-Wise, and other numismatic publications.   

Borckardt has contributed substantially to countless numismatic auction catalogs, and served as the sole cataloger for several important catalogs. He has experience with many of the most important collections sold at auction including the Eliasberg Collection, the Harry Bass Collection, multiple collections of Dr. Steven Duckor, the Eugene H. Gardner Collection, the Eric P. Newman Collection, the Donald G. Partrick Collection, and others. The Newman and Partrick Collections included significant offerings of American colonial-era coins.

Awards include the Early American Coppers’ Herbert Silberman Award in 2021, the ANA Numismatist of the Year in 2020, an ANA Presidential Award in 2018, the Numismatic Literary Guild’s Clemy Award in 2016, and several other awards from the Numismatic Literary Guild. Borckardt has also delivered several talks and presentations at various numismatic meetings, and has served multiple times as an instructor at the ANA Summer Seminars.   

After graduating from the University of Pennsylvania, Marc joined one of the two firms that later merged in late 1982 to form Heritage. He is has been with the company without interruption since joining in August, 1975. He founded and oversees the operations of the Heritage Overseas offices, which are now in France (since 1979), Germany (since 1979), Switzerland (since 1984), and the Netherlands (since 1990). The Heritage offices in France, Switzerland and the Netherlands are all run by natives of those countries, coordinating in their own languages through Marc at the German office with the Heritage world headquarters in Dallas. The European offices, under Marc's supervision, in turn offer Heritage services to collectors, consignors and estate executors in their own countries and in their own languages, as well as to banks and Central Banks around Europe and the world.

Mark has been an active and important presence in the rare coin industry on a full time basis, since 1979. He has worked for Steve Ivy Rare Coins, Heritage Rare Coin Galleries (an early incarnation of Heritage Auctions), David Hall, Mark Salzberg, at NGC as a grader, Pinnacle Rarities and as owner of his own numismatic business, Mark Feld Rare Coins.

An avid coin collector from an early age, Mark has been quoted as saying “Numismatics must run in my blood, literally. Numismatic pioneer B. Max Mehl was my grandmother's uncle, and I have always been very proud and respectful of that special connection.” And Mark has backed up those words in his dealings with collectors, as well as dealers, over a period spanning more than thirty years. He has been widely recognized as an outstanding source of numismatic information and collecting advice to countless collectors - a  true collector’s advocate.

Al Pinkall joined Heritage as Director of the Numismatic Sales Department in 2011. A collector since childhood, Pinkall has been a full-time professional coin dealer for 25 years with extensive experience in high-grade and proof classic U.S. coins. In 2010, he acquired the rare coin and precious metal assets of another New England dealership, Ed Lee Certified Coins.  

Pinkall’s business success has been built upon the foundation of providing the most candid, expert, and ethical advice to collector-investors who were acquiring expensive numismatic rarities. His stellar reputation in the high-end numismatic community, providing such high levels of service and expertise, has made him a natural fit at Heritage.