Abstract: An informational display device and method for displaying informational material about an item to potential customers for the item. The device includes a housing for removably receiving informational material, and a clip portion for attachment to the item. In example forms, a vehicle information sheet or buyer's guide is secured to a window of a vehicle and can be removed, replaced and reused. In one form, the display device is modular and includes a clip adapted to be slipped over the top of a door glass of the vehicle, a rail removably attached to the clip, and a document display housing secured to the rail and comprising an inner panel and an outer panel, and defining a chamber therebetween for receiving and displaying a document, with at least a portion of the document display housing being transparent to allow viewing of the document therethrough.