1. Age and Rarity:
* Early Printed Books (15th-18th Century): These are highly sought after, especially incunabula (books printed before 1501).
* First Editions: The first edition of a well-known author's book is often more valuable than later editions.
* Limited Editions: Books with a small print run are generally more valuable.
* Signed Copies: Books signed by the author are often worth more than unsigned copies.
2. Author and Subject:
* Famous Authors: Books by well-known authors, such as Goethe, Schiller, or Heine, are more likely to be valuable.
* Significant Historical Subjects: Books dealing with important historical events or figures are often in demand.
* Rare or Unusual Subjects: Books on obscure topics or those with unique perspectives can be valuable.
3. Condition:
* Excellent Condition: Books in pristine condition with no damage or wear are the most valuable.
* Binding: Original binding in good condition is essential.
* Pages: No tears, stains, or writing.
* Dust Jacket: If the book has a dust jacket, it should be in good condition as well.
4. Market Demand:
* Collectible Books: Books that are popular among collectors are more likely to be worth money.
* Current Trends: Certain genres or themes may be more popular than others at any given time.
How to Find Out If a Book Is Worth Money:
* Consult a Professional Appraiser: A book appraiser can examine your book and provide an accurate estimate of its value.
* Use Online Resources: Websites like Abebooks and LibraryThing can help you research the value of your book.
* Check Auction Websites: Websites like eBay and Catawiki often have old German books for sale, which can give you an idea of their market value.
Remember:
* Not all old German books are valuable.
* Even common books can have historical or sentimental value.
* The value of a book can change over time.
To determine whether a specific old German book is worth money, it's best to have it appraised by a professional or do your own research using the resources mentioned above.