Auction Giant is a term used to describe two of the largest auction companies in the world, eBay and Sotheby's. eBay is an American multinational e-commerce corporation based in San Jose, California that facilitates consumer-to-consumer and business-to-consumer sales through its website. Sotheby's is a British-founded American multinational corporation headquartered in New York City that is one of the world's largest brokers of fine and decorative art, jewelry, real estate, and collectibles. Both eBay and Sotheby's are considered Auction Giants in the industry.