So you have a Harry Potter book and you think it might be valuable? But how can you tell if it is worth anything?Back in 1997, no-one had heard of JK Rowling
Most valuable Harry Potter book ever? Pristine first edition – unread and kept in darkness for 25 years – could command six-figure sum at auction - Hansons Auctioneers
A guide to collecting Harry Potter books
A guide to collecting Harry Potter books
Your Rare Harry Potter Book Might Be Worth up to $57,000
How to Tell if Your Harry Potter is a 1st Edition - Peter Harrington - The Journal
A guide to collecting Harry Potter books
Are my Harry Potter (first edition??) books worth anything? : r/harrypotter
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How to tell if your old copy of Harry Potter is worth up to £40,000