You are going to find a lot of junk loot in the Wasteland, but not everything needs to be thrown away. Giddyup Buttercup, for one, is a highly valuable junk item in Fallout Shelter. Due to its legendary rarity, most players wonder what to do with it. Well, do not just sell it away for extra Caps. The mechanical toy horse is an important crafting material for end-game gear. Hold on to any Giddyup Buttercups you find on your journey because they are going to be very useful later on.