How much is my book worth?
Enter a book’s ISBN, barcode or ASIN and get a free resale verdict in seconds. Create a free account to see the real numbers behind it: median market price, 12-month sales history and the best buyback offers.
How the book value estimate works
The estimate isn’t based on asking prices — it’s based on real sales: the median price your book has actually sold for between real buyers on the used market, not the wishful price of a listing that has been sitting for two years. That’s the difference between “it’s listed at $80” and “it sells for $34”.
Value alone isn’t enough either: a $60 book that sells once every three years is not the same opportunity as a $25 book that moves every week. So the verdict combines the median price with how often the book sells, market by market — the same book isn’t worth the same in the US, France or Germany.
What makes a book valuable?
It’s not age: most old books are worth nothing, and some recent titles are in hot demand. What matters is supply versus demand. Valuable books are almost always out of print — no longer being reissued — with demand that persists: technical and academic works, art books, monographs, specialist guides, first editions and limited printings.
The exact edition matters enormously. A hardcover, its paperback reissue and a revised edition have different ISBNs and different values. That’s why the estimate works by ISBN: it targets your exact edition, not just the title.
Does condition change the value?
Yes. The estimate reflects a used copy in decent condition — the most common case. A like-new copy sells at the top of the range; an annotated, yellowed or damaged one, well below it. A missing dust jacket on a collectible hardcover can cut the price in half.
Before selling, check the pages, the binding, the dust jacket and any annotations, and describe the condition honestly: used-book buyers forgive disclosed wear, not bad surprises.
Old books and books without a barcode
A book published before the 1970s has no ISBN — which says nothing about its value. For those, just photograph the book with BiblioScan: the AI identifies the title and edition from the cover or spine, then runs the same estimate. And if your book has genuine collector value — a first edition, a signed copy — have it confirmed by a specialist dealer before selling it online.
Just need to identify a book? Go to the ISBN lookup →
Free vs member
Free, no sign-up
- Title, author and publisher
- Book cover image
- Resale verdict (3 levels)
With a BiblioScan account
- Real median market price
- 12-month sales history and velocity
- Estimated net profit per book
- BiblioRank automatic ranking
- Best buyback offers compared
- Automatic good-deal detection
- Scan a whole shelf from one photo
- Bulk barcode scanning
- Buylists and sourcing lists
- Excel and CSV export
- Stock and sales tracking
- Your full scan history, saved
Frequently asked questions
How much is my book worth?
Enter its ISBN above: you get a free three-level resale verdict. The exact median price, the sales history and the best buyback offers unlock with a free BiblioScan account.
How is the value calculated?
From real sales of the same book, not asking prices: the observed median price, the number of sales over 12 months and how fast it sells, market by market.
Which books are worth the most?
Out-of-print books with persistent demand: technical and academic works, art books, monographs, first editions, limited printings. Age alone doesn’t create value.
Does condition affect the estimate?
The estimate reflects a used copy in decent condition. Like new, aim for the top of the range; annotated, yellowed or damaged, well below it.
My book is old — is it valuable?
Not necessarily: value comes from scarcity and demand, not age. Photograph it with BiblioScan to identify it without an ISBN and see what it really sells for.