Abstract: A storage and display unit for prepaid telephone calling cards, collectible cards, and the like which is made, at least in a major part, of a substantially transparent plastic having a reasonable amount of impact resistance to breakage, the unit being combinable with other units to assemble larger units, the unit providing one or more bins holding cards that are for sale, with the cards in view through the transparent portions of the unit, and arranged to have a key-lockable cover to at least deter unauthorized removal of cards. The unit also provides for display of a card's face to indicate the type of card in each card bin. The display can be arranged to be on the front or back of the unit, or both. When on the back, the unit is best oriented so that the display card seen through the transparent unit back is facing customers, and the locked cover is facing the clerk or other salesperson who has a key and is authorized to remove cards for sale.