Those itching to get ahold of an official movie poster for the Harry Potter and the Prisoner of Azkaban now have a chance. Looking much like the main image for the film's official website (though less animated and more sane), teaser posters can be purchased through an eBay seller for a limited time:
This is a [pre-sale] for the original movie theater teaser poster for the movie: Harry Potter and The Prisoner Of Azkaban. This poster measures at 27 x 40 inches and is in Mint condition. It has never been hung or displayed. Please note that this poster is 100% original. This poster features Sirius Black (Gary Oldman) holding up a numbered prisoner plate for Azkaban Prison in a mug shot. The poster actually looks like an old-west style Wanted Poster. Very clever!