Compare the same product, not just the same product family
One product family can contain Pro, Plus, Mini, generation, storage and regional variants with very different values. A price comparison should therefore preserve the attributes that materially define the item rather than collapsing everything to the broad family name.
Bundles need the same care. A camera body with a lens, a drone with several batteries, or a console with extra controllers should not automatically be priced against a bare main product. The sale form has to be understood before the comparison becomes useful.
- Prefer the same model or a demonstrably compatible variant.
- Keep condition groups comparable.
- Match the sale unit or understand the bundle contents.
- Exclude accessories and replacement parts that only mention the host product.
Active eBay listings are price references, not completed-sale proof
Kjøpsvakten uses active eBay listings as its primary automatic international price reference. These listings show what sellers are currently asking, not necessarily what buyers ultimately pay. The result should be read together with condition, shipping, local demand and the quality of the comparison evidence.
If only a small number of candidates are sufficiently similar, a broad range or lower-confidence assessment is more appropriate than presenting a precise median as if it were a verified market price.
Condition can outweigh a small difference in asking price
New, open-box, refurbished, ordinary used and parts-or-repair items belong to different markets. Within used condition, battery health, cosmetic wear, repairs, missing components and service history can also make a meaningful difference.
A slightly more expensive item with clear documentation and complete accessories may be the better purchase. Price should therefore be evaluated together with condition and uncertainty, not as an isolated number.
Know when not to issue a precise price verdict
If the exact model is unclear, a collection has an unknown quantity, bundle contents cannot be confirmed, or search results are dominated by sibling variants, the correct outcome is uncertainty. Kjøpsvakten is intentionally fail-safe here: it should suppress a categorical expensive-or-cheap verdict when the evidence does not justify one.