The cheapest listing is not always the cheapest book
Book listings are unusually easy to compare badly. Two copies can share a title but differ in ISBN, binding, publication date, language, cover, page layout or included materials. A marketplace listing may look cheapest until delivery is added.
A useful book price comparison therefore starts with identity and ends with the total delivered price. AffordThatBook is designed around those two checks rather than simply displaying the smallest number found on a page.
Match the exact edition first
Use the ISBN when the edition matters
The ISBN is the most reliable identifier for a particular edition. It is especially useful for textbooks, translated books, illustrated editions and books with several recent releases. ISBN-13 usually contains 13 digits and is printed near the barcode.
Still search by title and author
ISBN-only retailer searches can be too narrow. Sellers sometimes omit the ISBN, and another compatible edition may be cheaper. A good comparison uses the selected edition for context while also carrying the title, author, binding and language into retailer searches.
Check the cover rather than trusting it
Cover images are helpful but not definitive. Publishers reuse artwork, retailers display stock photos and marketplace sellers occasionally attach the wrong image. Confirm the ISBN or publication details on the final retailer page.
Compare the complete cost
- Item price: the advertised cost of the book.
- Delivery: including marketplace postage and regional shipping.
- Condition: new, used and ex-library copies are not equivalent.
- Currency: card conversion charges can change an overseas deal.
- Returns: a slightly dearer seller may offer much better protection.
Compare totals in your own currency where possible. If a retailer only reveals delivery at checkout, treat the visible price as provisional.
New books versus second-hand books
Used copies frequently offer the lowest price, particularly for older fiction and popular nonfiction. New copies can be better value when shipping is free, a used listing has unclear condition, or the book includes a one-time access code.
Read condition descriptions carefully. "Good" can permit highlighting, inscriptions or noticeable wear, while "acceptable" may mean heavy use. See our second-hand book guide before choosing a used copy.
A simple comparison process
- Search for the title, author or ISBN.
- Select the correct edition from the matching books.
- Choose binding, language, condition and currency.
- Compare priced results by total rather than item price.
- Open the retailer match and verify edition, condition and final checkout cost.
- Save promising links so you can compare them again before purchasing.