Free tools
Free tools for buying, selling and valuing used books
The checks experienced booksellers make every day, turned into quick, private tools. Everything runs in your browser — nothing to install, no account.
Used price comparison
Turn one title, author or ISBN into exact searches on 13 marketplaces and library catalogues. Choose any edition for the cheapest copy or match an exact ISBN.
Compare prices →Where to sell
Check instant buyback offers by ISBN and see which route — buyback, marketplace, dealer or bulk — fits the book you have.
Find buyers →Book value estimator
Score the factors that drive value — edition, condition, jacket, signature, scarcity and demand — and get a value band with the best selling route.
Estimate value →Condition grader
Tick the flaws you can see and get a standard bookseller grade plus a copy-ready condition note for your listing.
Grade a book →First-edition checker
Decode the number line on the copyright page, read year codes and check the signs of a book club edition.
Check edition →ISBN converter & validator
Convert between ISBN-10 and ISBN-13, validate check digits and calculate a missing digit.
Convert ISBN →Reseller profit calculator
Model fees, postage, packaging and cost to see profit, margin, ROI and your break-even price before you buy.
Calculate profit →Collection estimator
Count books by type for a bulk-offer ballpark — then send the summary straight into a request for real offers.
Estimate a collection →Tools give a first answer. People give the final one.
For anything that might be valuable, our free review service takes it from here.