This study examines the U.S. commerce in human cadavers for medical education and research to explore variation in legitimacy in trades involving similar goods. It draws on archival, interview, and observational data mainly from New York State to analyze market participants' efforts to legitimize commerce and resolve a jurisdictional dispute.Building on literature on professions, the study shows that how goods are traded, not only what is traded, proves integral to constructing legitimacy, thus suggesting a practicebased view of moral markets. The professionals, including a group of "gatekeepers," construct a narrative distinction between their own commerce and an implicitly less moral alternative and geographically insulate their trades from the broader commerce; creating in effect two circuits. Yet the professionals also promote specific practices of trade within their circuit to help them distinguish their own pursuit from an alternative course of action. The study's findings shed light on the micro-foundations of market legitimization and on the role of morals in sustaining professional jurisdictions.• 3The notion that markets permeate society is nothing new; scholars have long noted the pervasiveness of markets in society (Zelizer, 1979;Hirschman, 1982; FourcadeGourinchas and Healy, 2007; Sandel, 2009). Yet the development of legal markets for "goods" previously deemed off-limits to trade, such as human life and death, has proven surprising and raised anew the question of morals and markets. Despite calls for banning commerce in many goods, particularly human anatomical goods like blood, cadavers, and organs (