Abstract: Optional equipment on preowned vehicles is provided by a database storing unique identifier data for each one of the preowned vehicles and storing optional equipment data for each one of the preowned vehicles and associated with the corresponding unique identifier data for the corresponding preowned vehicle, and a software application for a computer device with communications components for connecting to a communications network, the software application operable to receive an inputted unique identifier data of a selected preowned vehicle, operate the computer device to access the database and retrieve the optional equipment data corresponding to the inputted unique identifier data, and output the retrieved optional equipment data for use for example by printing it on a window sticker.