It might be time to revisit your old copy of Harry Potter and the Philosopher’s Stone. A hardcover first edition of the book, published in 1997, is expected to fetch up to $33,700 (or about 4,585 Galleons) at a Bonhams Fine Books and Manuscripts sale in November as one of only 500 copies to include a typo on page 53.
In Harry’s list of school supplies, “1 wand” is included twice, reports the Independent. A Bonhams rep calls the typo—fixed in later editions—”a treasured piece of Harry Potter arcana.”
This article originally appeared on Newser: Harry Potter Typo Could Make You $34K Richer