A rare Harry Potter book bought for £1 (NZ$1.85) at a table top sale has fetched £28,500 (NZ$52,790) at auction.
The 1997 edition of the first in JK Rowling's seven-part series was discovered by auctioneer Jim Spencer in a banana box full of books.
The hardback, of which only 500 copies were published by Bloomsbury, was sold to an anonymous bidder at Bishton Hall in Staffordshire on Tuesday — Miss Rowling's 54th birthday.
Around 300 of these first editions went to libraries at the time. Auctioneer Charles Hanson said: "It was a magical moment... and [it] is an investment like no other."
Mr Spencer said he was in "disbelief" when he found the copy — which he described as the "Holy Grail for book collectors".