I'm travelling to the US later this month so I've been looking to buy a US adaptor for the charging block I've got. All you can buy from Apple is the World Travel Adaptor Kit for £29. This includes five different plugs. Only one of which I want. Apple could easily sell plugs individually. Think of the wasted packaging, the wasted plastic, the wasted material, the extra weight in shipping the item. Oh, but think of the extra profit!