Classic auction houses and household names are hard to find among listed companies. Sotheby's (formerly NYSE: BID) - a world-renowned auction house that auctions works of art, antiques, jewelry and real estate, was privatized in 2019 and has not been listed on the stock exchange since then (delisting). Christie's - another big player in this segment - was never listed on a stock exchange. In this respect, this thematic compilation focuses on similar business models that have a fundamental proximity to transactions in which buyers and sellers are brought together and in which a bidding process plays a role in some form.