A proof copy of the first Harry Potter novel that was bought for pennies in a second-hand bookshop almost 30 years ago has sold at auction for 11,000 pounds ($13,900.)

British auctioneers Hanson鈥檚 said Monday that the first-edition copy of which states 鈥渦ncorrected proof copy鈥� on the cover, was bought in 1997 from a shop in south London with two other books for a total of 40 pence ($0.50.)

The seller, who was not named, picked up the book about the famous boy wizard as a 鈥渢hrow-in鈥� with other titles and didn鈥檛 read it or pay much attention to it for years 鈥� until she read online about the high prices some Potter copies achieved, Hanson鈥檚 said.

The book was sold to a private U.K. buyer on Wednesday for a hammer price of 11,000 pounds, and a total of 14,432 pounds including a sales premium.

Jim Spencer, head of books at the auction house, said the copy鈥檚 inside title page mistakenly stated the author鈥檚 name as 鈥淛 A Rowling鈥� instead of .

鈥淭his book so deserved to do well. This proof copy is where the Harry Potter phenomenon began. This is the very first appearance in print of the first Potter novel,鈥� Spencer said.

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