This article discusses the commercial, socio-economic and legal dynamics of slave trading in Egypt on the basis of papyri from the AH third-fourth/ninth-tenth centuries CE. Particular focus is given to the activities of slavers, the networks of professional slave traders, the socio-economics of slave acquisition, and commercial dynamics at slave markets. Much of the discussion draws on the contents of five contemporary papyrus documents that are presented, translated and annotated in the appendix.