According to Peter Harrington of London, a fine book seller,
“The most important thing to keep in mind is that very few first editions are actually valuable. A book’s market price is dependent on many factors, including condition, scarcity, and demand. For instance, the Harry Potter novels are very popular, but so many first edition copies were printed of the later books in the series (12 million for Harry Potter and the Deathly Hallows) that even fine copies are worth next to nothing. On the other hand, some books that are scarce on the market are of little monetary value simply because there is no demand for them. And a first edition that sells for thousands of pounds in fine condition may have almost no value if it is damaged or missing pages. Additionally, books that are not first editions can be considered collectible for a variety of other reasons – if they are inscribed by the author, have been owned by a famous person, or are specially bound or illustrated. Early printings with significant corrections or changes to the content can also have value. Differences between the first six editions of The Origin of Species demonstrate important changes in Darwin’s thinking over time, making them all appealing to collectors.”

That being said, at Deb’s Book Paradise we love all books and believe that first editions are cool. We may not even know the value but if it is rare we will price accordingly. But since our accordingly is to make sure it finds a good home, you will find that we will price it under the actual value. We typically only have one of a kind for these books so if it is something you will enjoy, don’t leave it behind.