Harry Potter and the Philosopher's Stone
One copy of the Harry Potter and the Philosopher's Stone book with the typo will go on auction on 9 November Wikimedia Commons

First editions are often of value but when it comes to Harry Potter, a minor typo could make thousands of pounds worth of difference to the price tag. Five hundred copies of JK Rowling's Harry Potter And The Philosopher's Stone were printed with an error and now, an auction house in the UK has valued one such copy at around £20,000 ($25,837).

British auction house Bonhams Fine Books and Manuscripts will sell the copy containing the rare mistake in London on 9 November. The typo is present in the hardback copies published in June 1997 by Bloomsbury and can be found on page 53 of the book.

"This copy is in excellent condition — one of the very best I've seen," Bonhams head of Books and Manuscripts, Matthew Haley, stated in a press release.

On the page, a list of supplies for first-year wizards is mentioned, including a wand, cauldron and brass scales. The money-making mistake lies in the repetition of "1 wand" in the list.

"As the first book in the series, Harry Potter and the Philosopher's Stone has a special place in the affections of the millions of readers across the world and the proof reading error about the wand in the first edition has, of course, become a treasured piece of Harry Potter arcana," Haley added. "Like most enduring books aimed at younger readers, the Harry Potter books also have wide appeal to adults and there is a strong market among collectors for first editions."

Already, Harry Potter fans have started flipping through to page 53 to check if their copy is one of the lucky ones.