A method and system for managing trading in trading networks. At least one trading network package is offered. Each trading network package is based on negotiations occurring prior to receiving purchase requests from customer members of the trading network. Each trading network package is configured to include: (i) a value-add service offering offered by the trading network to the customer members for a fee, (ii) a managed package for which a customer member of the customer members provides a volume commitment and for which actual purchases are tracked; or (iii) both the value-add service offering and the managed package.