Exchanges have always had more than economic significance: values circulate and encounters become institutionalized. This volume explores the changing meaning of the circulation of second-hand goods from the Renaissance to today, and thereby examines the blurring of boundaries between market, gifts, and charity. It describes the actors of the market - official entities such as corporations, recognized professions, and established markets but also the subterranean circulation that develops around the need for money. The complex layers that not only provide for numerous intermediaries but also include the many men and women who, as sellers or buyers, use these circulations on countless occasions are also examined.