Offer comparability
The evidence around a product changes the offer.
Two pages can share a title while representing meaningfully different purchase experiences. Product identity is necessary, but it is not sufficient.
Shipping belongs in the price picture
An item price without shipping evidence is incomplete. Free shipping must be observed, not inferred from a blank field. Delivery range matters separately: two offers with the same total cost may differ in timing and reliability. Location can affect both, so record the marketplace and destination context where relevant.
Seller and fulfillment shape risk
Seller identity helps distinguish first-party, marketplace, and unknown fulfillment contexts. It can support checks for consistency, return handling, and offer continuity. When seller evidence is missing, research should not silently assign a familiar merchant or assume a fulfillment channel.
Condition is not a cosmetic label
New, open-box, refurbished, and used products can have different prices, warranties, included components, and return expectations. Combining them can make a price range look wider and a low offer look more attractive than it really is. Condition should be an explicit comparability gate.
Variations can hide different products
Color may be a minor variation, but size, capacity, quantity, generation, compatibility, or bundle contents may change value substantially. Parent pages can also display a price associated with one child variation while a researcher intends another. Preserve the selected variation and avoid treating a parent abstraction as a purchasable offer.
Unknown should remain visible
If shipping, seller, condition, or variation fields are unavailable, mark each missing field. Do not fill shipping with zero, seller with a presumed identity, condition with new, or variation with the first available option. The resulting record may be less complete, but it is more trustworthy.
Conclusion
A marketplace offer is a product plus commercial and fulfillment terms. Research becomes safer when those terms are treated as evidence rather than decoration.