Please submit sites which focus on retail sales to this category. Sites about collections or the process of collecting should be submitted to the related Recreation: Collecting: Advertising: Trade Cards category.
Trade cards are paper items given away as a promotional device with another product such as cigarettes or tea. In the United States these cards were often given away by the merchant selling the item, while in Europe the cards were typically packaged with the item being sold. Cards may have been created as either a single card or as part of a set to be collected.