royal leaf - gift for the person who has everything or worst gift ever?

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I've just seen a company that's selling leaves (in a frame with certificate) that have suposedly fallen from the trees at Buckingham Palace as your chance to "own a piece of Buckingham Palace" and a "unique hand selected ROYAL LEAF, that has recently fallen from the private walled gardens of Her Majesty Queen Elizabeth II’s London home - Buckingham Palace!"