1. A method for obtaining a list of price guarantees comprising: determining a plurality of retailers; obtaining respective machine-readable price guarantees of the plurality of retailers; for each of the machine-readable price guarantees of the plurality of retailers, parsing the machine-readable price guarantee to determine price guarantee characteristics that comprise a refund calculation formula, price guarantee time period, price guarantee scope, price guarantee documentation requirements, and excluded items; associating, in a machine-readable storage medium, the price guarantee characteristics with the respective one of the plurality of retailers; and tracking eligibility for a potential refund for a customer based, at least in part, on the price guarantee characteristics, purchase information of the customer, and subsequent prices off each of the plurality of retailers.