How to check a product's price history before you buy

Every “was 349, now 249” claim rests on a number you cannot see on the page: what the product actually sold for over the last few months. A price history is that number drawn over time, and it is the difference between a real saving and a sticker.

You do not need a chart to make a good decision, but you do need three figures: the current price, the lowest price in the last year, and the price the product spends most of its time at. Everything below is about finding those three quickly.

The three numbers that matter

• The floor — the lowest price reached in the last twelve months. This is your realistic best case, and anything within a few per cent of it is a good buy.
• The median — the price the product sits at most of the time. A discount measured against the median is a real discount; one measured against a list price often is not.
• The age of the low — a floor reached last week means the price is actively moving. A floor from eleven months ago usually means it will not come back soon.

Reading a history in thirty seconds

1. 01Find the floorLook for the lowest point of the last year and note how recent it is.
2. 02Ignore the spikeA short jump upward just before a sale is the oldest trick in retail. Judge against the flat part of the line, not the peak.
3. 03Place todayIf today sits near the floor, buy. If it sits near the median with a discount badge on it, the badge is decoration.

If today's price is the same as it was three weeks ago, the badge on the page is marketing, not a discount.

What a history cannot tell you

History is evidence, not prophecy. A product that has never been discounted can be cut tomorrow because a successor was announced, and a product that falls every quarter can hold its price for a year if supply tightens. Use the line to judge whether today is a good price, not to predict next month.

It is also blind to the things that sit outside the price: delivery, warranty length, return windows and whether the seller is the retailer or a marketplace partner. Two identical numbers at two stores are not always the same offer.

Where a tracker fits

You can do all of this by hand with a spreadsheet and a lot of patience. A tracker does it by watching the page for you: you set the number you would happily pay, and the check runs daily on Plus or hourly on Pro until the page meets it.

The practical benefit is not the chart, it is the absence of checking. You decide once, in a calm moment, what the product is worth to you — and then you stop thinking about it until the email arrives.

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