30. The Marble Faun by William Faulkner – $125,000 (1st Edition)
Written by the legendary author William Faulkner, this was his debut book, and one of the only two books of poetry he ever published. What makes this first edition even more special is that it contains a personally inscribed note by the author himself that dedicates this book to his parents.
At first, the author struggled to find a foothold in the literary field and had problems selling even a few copies of this book. Well, now this copy is valued at a whopping $125,000!