The value of a signed RL Stine book depends on many factors:
* Rarity: How many copies were signed?
* Condition: Is the book in good condition?
* Demand: How many people want this specific book?
* Specific book title: Some titles are more popular than others.
* Signature: Is it a full signature, inscription, or just an autograph?
To get an idea of the value, you can:
* Check online marketplaces: Search for similar signed books on eBay, Amazon, or other online platforms.
* Consult with a book appraiser: They can provide a professional assessment of the value.
Remember, the value of a signed book can vary significantly. It's best to do your research and find out what similar books are selling for before making a decision.