A method for buying and selling vehicles includes receiving information identifying a vehicle, retrieving condition data corresponding to the vehicle from a condition database, wherein a device inside the vehicle generates at least some of the condition data while the vehicle is being operated, and analyzing the condition data to determine a condition of the vehicle, wherein the condition of the vehicle relates to at least one of a quality or a value of the vehicle. Further, the method includes communicating an indication of the vehicle condition to an end user device, and, in response to the indication of the vehicle condition, receiving an offer to purchase the vehicle. A notification is generated based on the offer to purchase the vehicle, wherein the notification indicates a status of a purchase of the vehicle according to the offer to purchase the vehicle, and the notification is communicated to the end user device.