Sotheby's
Sotheby's is a global company that engages in art auction, private sales and art-related financing activities. Founded in 1744, Sotheby's operates in 40 countries, with principal salesrooms located in New York, London, Hong Kong and Paris.

Villa Grisebach
Villa Grisebach is the top-selling auction house for Modern Art in Germany since 1988 with the main focus on photography and art of 19th to 21st century. Further it has remained the unchallenged market leader in German 20th century art. All of this is a result of the great dedication of a highly professional team.

Tajan
Paris-based auction house is the largest auction company in France and considered to be one of the largest auction firm in the world. Their web site is informative as well as being written in French and English.

Swann Galleries
Founded in 1941 as an auction house specializing in Rare Books. Today they are the largest specialist rare book auctioneers in the world, and their business has expanded to encompass the Visual Arts

Phillips-DPL
Phillips specializes in the sale of Contemporary and American Art, Jewelry, 20-21st Century Design, and Photographs. The firm also focuses on private treaty sales with particular emphasis on Impressionist, Modern & Contemporary art through de Pury & Luxembourg Art in Geneva and the de Pury & Luxembourg Gallery in Zurich. Phillips conducts auctions in New York, Geneva and Zurich.

LAMA
LAMA is the premier auction house for Modern and Contemporary Fine Art & Design. Auctions are held at least two times a year in Southern California and offer material ranging from fine art and furniture to sculpture and decorative arts.

Dorotheum
Every year the Dorotheum hosts approximately 600 auctions. With a staff of over 400 and more than 70 art experts in a wide variety of collecting areas, are at your service not just in Vienna but in a number of branch offices throughout Austria and in the capital of the Czech Republic, Prague.

Christie's
Christie's salerooms have been a popular showcase for the unique and the beautiful since 1766. They provide a variety of services for art collectors and their website has a good FAQ's page that discusses how to buy and sell at auction.

Butterfields
Recognized as one of the most dynamic auction houses in the world today, One of the largest companies of its kind in the United States and the third largest auction house in the world. A house of experts in many fields, they specialize in the appraisal and sale of fine art, antiques and decorative objects in virtually every auction category.

Bonhams
One of the world fastest growing auction house, it is also the world oldest and largest auctioneer of fine art and antiques still run by auctioneers. They are recognized worldwide throughout all sectors of the fine art, antiques and collectors market, and several of its departments are already established world leaders within their category.