Harry Potter Hogwarts Houses Miniature Sheet issued by the Royal Mail on July 17, 2007.The sheet features five 1st Class stamps showcasing the crests of Gryffindor, Hufflepuff, Hogwarts, Ravenclaw, and Slytherin.These stamps are commemorative and technically valid for postage within the UK for their face value.
Estimate: $30 - $40
Auction : Stamps, Covers & Signatures: A Worldwide Philatelic and Autograph Sale — Cool Stuff Auctions