A watercolor illustration by Thomas Taylor, who was a 23-year-old bookseller when he first painted the work, sold for $1.9 million to become the most valuable Harry Potter item ever sold at auction.

Original ‘Harry Potter’ Cover Art Could Fetch Up To $600,000 At Auction—Possibly Breaking Book Series’ Record By Mary Whitfill Roeloffs, Forbes Staff.

The original illustration for the first edition of J.K. Rowling’s 1997 novel “Harry Potter and the Philosopher’s Stone” has sold for a record-breaking $1.9 million.

Sotheby's June 26 auction of Thomas Taylor's watercolor illustration for Harry Potter and the Philosopher's Stone is estimated to sell for $400,000-$600,000.