A method for brokering a repair to a vehicle with multiple potential repair service providers by temporarily associating a random user-anonymous session identifier with a brokering session for the vehicle's access device, transmitting the session identifier and a service request to each potential service provider, receiving multiple offers identifying a cost associated with responding to the repair request, determining a total response repair cost aggregated from the responding providers, selecting a winning offer, determining a cost to the access device for resource usage during the brokering session representing, reducing a gross revenue to the selected winner by the total response cost; and subsequently, re-using the session identifier for aggregating other usage records and offsetting costs to compensate non-winning responders.