Auctioneers of the Great American Bison

buffaloWhether you are buying or selling bison, we’ve got you covered. With nearly 40 years experience in marketing North American Bison at public auction, Bradeen Auctions has sold tens of thousands of head of bison all across the United States. As active members in the National Bison Association and most state and regional associations, we are proud supporters of the bison industry.


buf pageAuctioneers Ron Bradeen and Jud Seaman make a powerful team with many years of industry experience and involvement. They know the animal, know the producers and know what it takes to market your animals in the manner that will produce the best results. Over the years, they have garnered record-setting prices at the Gold Trophy Show and Sale, Black Hills Buffalo Classic and Custer State Park Fall Classic, as well as many other nationwide auctions.

Bradeen Auctions is available nationwide for all types and sizes of auctions, including private production, association events, liquidations and reductions. We also offer confidential consultation on marketing your animals. Our extensive network of buyers and contacts allows us to market your animals to the people who want to buy them. With many years of industry experience and involvement by our professional staff, we are ready to go to work for you!

Ron personal hat

Ron Bradeen

  • 1978 Graduate Western College of Auctioneering
  • Licensed REALTOR since 1980
  • Life Member National Auctioneers Association
  • Member South Dakota Auctioneers Association
  • Member Southern Black Hills Board of REALTORS
  • Past Southern Black Hills Board REALTOR of the Year
  • Member Southern Black Hills MLS
  • 1986 South Dakota Auctioneers Association Bid Calling Champion
  • Past President and Director, SDAA
  • Certified Auctioneer’s Institute Designation
  • Auction Marketing Institute – Accredited Auctioneer of Real Estate


Judson Seaman
Key Realty & Auction Inc. Broker/Auctioneer

  • 1994 Graduate Western College of Auctioneering
  • 15 years as Instructor at Western College of Auctioneering
  • 17 years in the automobile auction area
  • 21 years as buffalo/bison auctioneer
  • Member National Auctioneer’s Association
  • Member and past Director, South Dakota Auctioneers Association
  • Past Director, National Buffalo Association
  •  Certified Auctioneer’s Institute Designation
  • Licensed Auctioneer in South Dakota, North Dakota, Texas and Illinois
  • Real Estate License since 2000 in South Dakota, 2010 North Dakota and 2015 New Mexico