Use identifiers to find the same product
A reliable identifier gives a comparison a stronger starting point than a similar title.
Use a valid product identifier
Shop checks the format and checksum of supported retail barcodes and book identifiers. A matching identifier is strong evidence, but conflicting variant attributes still need attention.
Keep book editions separate
Author, title, language, edition and format matter. A printed book, an ebook and an audiobook are different purchase options. Do not assume that identical titles mean identical editions.
Confirm every visible variant
Storage, memory, color, size, capacity, connectivity and regional version can change what you receive. Shop keeps conflicting variants separate even when the brand and base model match.
Use photos as a starting point
A photo can suggest a brand, object or model. Similar appearance does not establish authenticity or an exact variant. Review the suggested query and check source identifiers before choosing an offer.
How Shop calculates comparisons and price status
Find tracked offers