Harry Potter fans now have the rare opportunity to purchase some of the original artwork created for the bestselling books, reports the Independent. Two original ink and watercolor illustrations by British illustrator Cliff Wright that became the cover art for the British editions of the second and third Harry Potter novels are currently for sale at Los Angeles’s Nate D. Sanders auction house.

The works illustrate scenes from the second and third installations in the series, Harry Potter and The Chamber of Secrets (1998) and Harry Potter and the Prisoner of Azkaban (1999). The Chamber of Secrets drawing, which shows the protagonist riding in flying Ford Anglia with his best friend Ron and Hedwig the owl, is the larger of the two works and has a starting price of $20,000.

Cliff Wright, original cover art for Harry Potter and the Prisoner of Azkaban.

The bidding begins at $12,500 for the Prisoner of Azkaban illustration, which depicts a pivotal scene from the novel in which Harry and Hermione must ride a hippogriff—a magical hybrid of a horse and an eagle.

The online auction runs through March 27th and has yet to attract any bids.

Jonny Duddle, new cover art for Harry Potter and the Philosopher’s Stone, to be reissued in September.

Bloomsbury, the British publisher of the series, is reissuing Harry Potter this September with all new art by Jonny Duddle, as reported by the Telegraph.