Fans of "Harry Potter" might find themselves dusting off their shelves for old copies of the first book, as author Philip W. Errington revealed in the book, "J.K. Rowling: A Bibliography 1997-2013," that some editions could be worth a lot of money today.

Errington, who has facilitated many auctions during his work at Sotheby's, said that the first Potter release, "Harry Potter and Philosopher's Stone" regularly appears and sells well in the auction selections, and collectors are still on the lookout for these potential goldmines. However, not all Potter copies are actually valuable, but Errington suggested some indicators, which you can check from your personal copies.

Errington said that the "Harry Potter and Philosopher's Stone" edition that was published by Bloomsbury on hardback cover, which features a drawing of Harry as he stands in front of a train is the most valuable Potter release. A copy of the rare book actually sold for almost $28,000 or £19,700 at a Christie's auction in 2007, according to The Guardian.

The softback version of this book, also released by Bloomsbury, could be worth some money, too. However, its value is not as significant as the hardback version.

Readers in America who purchased "Harry Potter and the Sorcerer's Stone," which was published by Scholastic, could score some shopping money with their copy, but the version printed by American Book Club edition has no value, according to Entertainment Weekly.

However, most "Harry Potter" releases, especially books three to seven, have little or no monetary value since these have been published in larger quantities. Unless the copies have been signed by the author, it's best to keep the copy in your personal library for your future kids.

If you want to thoroughly examine your "Harry Potter" book, look up the details and indicators suggested by Mugglenet.