Players use cards to bid on various items that might come up for sale on eBay. An electronic gizmo determines turn order and decides when a particular auction is over. Players only have a few seconds to place a bid when their color is called by the gizmo or a buzzer will sound and bidding moves to another player. Items up for bid are shown with an estimated value. The real value of the item can be higher or lower and known only when a player actually wins the bidding on that item. Players can double-score items if they can get a collection of three or more items of the same color/category. The game gizmo requires 3 AAA batteries (not included). - BoardGameGeek