Abstract: A transaction management system for managing the purchase of products or services by a buyer comprising: a data store for storing a seller identifier and seller offer data indicating at least one product or service offered for sale; and transaction data for each of a plurality of historical transactions, a transaction identifier, and the seller and a buyer identifier. The system also having a program store storing instructions and a processor coupled to the data store and to the program store for implementing the instructions for controlling the processor to implement a buyer interface to receive a purchase inquiry, output seller offer data for a plurality of sellers, the sellers each being able to meet the purchase criteria; and receive a purchase request accepting an offer. The processor can also analyze the transaction data to determine stability a market.

Abstract: A transaction management system manages the purchase of products and/or services by a buyer from sellers. The system comprises: (a) a data store for storing seller data comprising, for each of a plurality of sellers, a seller identifier and seller offer data indicating at least one product and/or service offered for sale (b) a program store storing processor implementable instructions; and (c) a processor coupled to the data store and to the program store for implementing the stored instructions.

Abstract: A transaction management system manages the purchase of products and/or services by buyers from sellers, the system comprising: a data store for storing seller data. Said data comprises, for each of a plurality of sellers, a seller identifier and seller offer data indicating at least one product or service offered for sale; a program store storing processor implementable instructions; and a processor coupled to the data store and to the program store for implementing the stored instructions.