Direct observations are strongest
A direct official observation comes from a source page or structured record that clearly identifies the product, country, plan, currency, and price.
These records are the strongest evidence because readers can understand where the value came from and, when available, return to the source for confirmation.
Derived coverage needs labeling
Some systems can expand coverage from an anchor record plus country or currency metadata. That can be useful for exploration, but it is not the same as observing every local checkout page directly.
When derived coverage exists, the interface should label it so readers do not confuse a calculated helper row with a direct official observation.
Why this matters for advertisers and readers
Readers need to trust that the site is not inventing prices. Advertisers and reviewers also need to see that the publisher understands the difference between source-backed content and generated filler.
A clear methodology page, source fields, and warnings for derived rows make the site more useful than a plain scraped table.