A deal is only as good as its historical benchmark. Rather than relying on manufacturer claims, ExtraVaul evaluates each product’s trailing 90-day price trend line across authorized US retailer databases before spotlighting it to our community.
For every curated item in categories such as Smart Kitchen, Premium Audio, and Seasonal Tech, we calculate a rolling 90-day median price. An offer only receives our "Verified Drop" badge if its promotional price drops at least 15% below this historical median.
During peak promotional calendars (such as Prime Big Deal Days and Black Friday), third-party marketplace merchants frequently fluctuate unit rates. Our audit team checks historical records to verify whether an advertised discount represents an all-time low or merely a standard seasonal cyclic dip.
In categories like cosmetics, holiday fragrances, and home goods, retailers often create festive bundles that mask per-unit price increases. We decompose multi-item packs into individual unit values, ensuring that readers receive genuine volume savings.
If an item's promotional price matches previous low records but does not surpass them, we transparently classify it as "Standard Seasonal Low" rather than "Historic All-Time Record."