1. Introduction to the Aztec economic world; 2. The structure of Mesoamerican economy; 3. The Mesoamerican marketplace; 4. Merchants, profit and the pre-Columbian world; 5. Often invisible: domestic entrepreneurs in Mesoamerican commerce; 6. The professional retail merchants; 7. Merchant communities and pochteca vanguard merchants; 8. The tools of the trade and the mechanics of commerce; 9. Conclusions.