Type in three prices and this tells you whether a Black Friday deal is really the cheapest the product has been, or just cheaper than the "was" price on the label. Free, no sign-up, and nothing you type leaves your browser.
Prices and specs last checked by Look Into on 2 November 2026 · how we picked
Check a deal
All three prices are for the same product from the same seller.
How it decides
The listing gives you one comparison: today against the "was" price. That number is chosen by the seller. The checker adds a second comparison the seller does not show you: today against the cheapest the product has actually sold for in the last 90 days. Three results are possible.
| Result | What the numbers show |
|---|---|
| New 90-day low | Today's price is below anything charged in the last 90 days. This is a real price drop, whatever the "was" price says. |
| Matches the low | Today's price is within 1% of the 90-day low. Not a new low, but you are not overpaying against recent history. |
| Not the best price | The product was cheaper at some point in the last 90 days. The saving on the listing is real against the "was" price, but you could have paid less. |
It also tells you how far the "was" price sits above the 90-day low. When the gap is large, the headline percentage is measuring the distance from a high reference point, not from what people were recently paying. That is a pattern to notice, not proof that anyone has broken a rule: a product can genuinely have sold at a higher price earlier in the year.
Worked example (illustration, not a real listing)
An air fryer shows was £199.99, now £129.99. The listing says you save £70, or 35%.
Its price-history chart shows it sold for £119.99 six weeks ago. So today's "deal" is £10 dearer than its own recent low. The "was" price sits 67% above that low.
Verdict: not the best price. The 35% is true against £199.99, but £119.99 was available within the last 90 days.
How to find the 90-day low
- For Amazon UK: paste the product link into a price-history site such as CamelCamelCamel or Keepa. Read the lowest Amazon price over the last three months, not the all-time low.
- For other UK shops: PriceSpy and PriceRunner show price history across retailers. Check that the history is for the same seller you are buying from.
- Same product, same size, same colour. Different variants can carry different prices and different histories.
- Ignore one-day spikes down if the chart shows the price lasted only hours; use the lowest price that held for at least a day.
What this checker cannot tell you
It does not know whether the product will drop further before Cyber Monday, whether a different seller is cheaper, or whether the product is any good. It only compares the three prices you enter, so the answer is as reliable as the price history you read. For the bigger picture on how much of Black Friday is a genuine discount, and what UK pricing rules changed this year, see our Black Friday 2026 UK guide.
Common questions
Is a Black Friday deal fake if the "was" price is high?
Not necessarily. A high "was" price can be genuine if the product really sold at that price for a meaningful period. The more useful question is whether today's price beats what it actually cost recently, which is what the 90-day low tells you.
Why 90 days and not 30?
Thirty days can sit entirely inside a pre-sale period where prices have already risen. Ninety days usually reaches back past it, into the price the product normally sells at.
Does this tool collect my data?
No. The sums run in your browser. Nothing you type is sent to Look Into or anyone else.