01 / PrincipleWhy history beats the badge.
Amazon prices move constantly — many products change price several times a week, some several times a day. A single snapshot with a “was” next to it tells you where the price is; it can't tell you where it has been, which is the only thing that makes “cheap” mean anything.
The history answers the questions the badge dodges: What does this usually cost? What is the lowest it has been? Is today's price unusual, or Tuesday? Has it been this low before, and when? Once you have those, the badge is irrelevant.
02 / Reading itWhat to look for on the chart.
The band it lives in
Most products trade inside a range for months at a time. Find it. A deal is only a deal if today's price sits clearly belowthat band — we use the median as “usual” and want a price at least 15% under it.
The floor
The lowest point on the chart, and how often the line touches it. A floor it hits every Prime Day and Black Friday tells you what “a good price” is for this product, and roughly when to expect it again.
Spikes
Short, sharp jumps — a single day at double the price — are usually a third-party seller filling a gap while Amazon was out of stock. They are exactly what inflated “was” prices anchor to. Ignore them.
The run-up
A gentle climb in the fortnight before a sale, then a “drop” back to the old price, is the pre-sale bump. The chart makes it obvious; the product page makes it invisible.
Who was selling
Good tools separate Amazon's own price from third-party sellers. A low that only ever came from an unknown marketplace seller is a different proposition from Amazon's own clearance.
03 / ToolsWhat works for Amazon UK.
| Tool | Best for | Watch out for |
|---|---|---|
| Keepa | The deepest Amazon price database there is, with a browser extension that draws the chart on the product page. It is the data source behind this site. | Dense charts with many series; the free tier hides some data. Rewarding once you learn to read it. |
| CamelCamelCamel | Simple charts and email alerts on a target price. | Coverage is strongest for the US store; UK history can be thin or missing on newer products. |
| DropSignal price check | A plain-English verdict for Amazon UK — usual price, lowest ever, how far below typical today's price is — from the same Keepa data, without reading a chart. | Amazon UK only, and we only show a verdict when we hold at least 14 days of history. |
04 / Step by stepThirty seconds, start to finish.
- Copy the product link, or its ASIN — the ten-character code in the URL after
/dp/. - Paste it into the price check.
- Read the verdict: all-time low, below typical, typical or above typical— with the usual price, the lowest recorded and how many days of history the call is based on.
- If it says typical, the badge is decoration. If it says below typical or all-time low, decide on the product's merits — the price is real.
05 / QuestionsThe ones we get asked.
How far back does the history go?
Keepa has tracked many Amazon UK products for years. We use the trailing 365 days for “usual” and “typical high”, and show up to eighteen months on a deal page chart.
Why does a product have no history?
It is new, or rarely viewed — history is built from observations, so obscure listings have fewer. When we hold fewer than 14 days we say so rather than guess.
Can I be alerted when a price drops?
Yes — every deal page has a drop alert, and account holders can track any ASIN with a target price. The strongest drops also go to the free Telegram channel and the daily email.
Check any Amazon UK price — paste a link, get a verdict against the product's own history.