Abstract: Described are systems and methods to verify the identity of an evaluated device that has been previously identified and evaluated remotely from a reader device. The reader device obtains from an evaluated device temporally changing information, where the temporally changing information includes a unique identifier associated with the evaluated device and a proximity indication. The reader device verifies the temporally changing information by verifying that the unique identifier is contained in the temporally changing information, that the unique identifier is stored in a database associated with the reader device, and that the temporally changing information includes the proximity indication indicating that the evaluated device and the reader device are proximate to each other. Upon verifying the temporally changing information, the reader device obtains the price of the evaluated device, based on the unique identifier associated with the evaluated device.