Turn finished modules into money for the next one
Paste every ISBN at once. We'll estimate the collection's resale value, then you can list each book free.
Value up to 30 books together
Useful? Pass it on.
Know someone with old module books? Send them the free shelf value checker.
One check, a clear next step for every book
Built for the end of a module, when a whole stack of books is done with at once.
Batch check
Value a semester's worth of books in one go instead of searching one by one.
Real market signals
The estimate uses marketplace asking-price data and tells you when an ISBN does not have enough evidence yet.
Keep the sale price
Set your own price, pay no seller commission, and use prepaid tracked shipping.
Questions about valuing a shelf
Estimates, listing a box of books, and what selling costs.