1. Vintage Hardcovers: First editions of Enid Blyton's hardcover books published in the 1940s, 1950s, and early 1960s can hold significant value. Well-preserved first editions with good dust jackets can range from $100 to several thousand dollars, depending on the title and condition.
2. Vintage Paperbacks: Original paperback editions of Enid Blyton books from the same era can also be valuable, especially if they are in excellent condition. Prices can range from $50 to a few hundred dollars for rare editions.
3. Later Hardcover Editions: Hardcover reprints of Enid Blyton books published after the original editions may have a lower value than first editions. Depending on the condition and print run, these books can range from $10 to $100.
4. Paperback Reprints: Paperback reprints of Enid Blyton books, especially recent editions, generally have a lower value compared to vintage editions. They can range from $1 to $20.
5. Collections and Box Sets: Collections of Enid Blyton books, such as the Famous Five or Secret Seven series, can be valuable, especially if they include multiple original hardcover or paperback editions. Prices for these collections can range from $100 to several hundred dollars.
It's worth noting that the value of Enid Blyton books can fluctuate over time, and rare first editions or special printings can command higher prices in book markets or auctions. If you own an Enid Blyton book and are interested in its value, it's best to consult with a bookseller or appraiser who specializes in children's literature to get an accurate assessment.