This chapter presents a complete specification of the Market of Resources, to allow a complete understanding of how is this environment able to support the implementation and management of Agile/Virtual Enterprises. The model of the Market of Resources includes three views: 1. The functional specification of the service provided, its processes structure and data structure using IDEF0 and IDEF1x modelling techniques; 2. The definition of a regulation regarding the operation and management procedures of the Market of Resources; and 3. A cost and effort model to allow a further analysis of the model performance.