Price MemoryWhat a discount really means

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Price history

Reading a price curve before you buy.

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Elderly man sewing by hand outside a bag and shoe repair shop, luggage and holdalls in the window — A repair shop beside the display window is a reminder that mending a bag often beats replacing it.Photo: veroyama · CC BY 2.0 · Wikimedia Commons · Open source page

Street view of a single-storey retail outlet with a large sign, flag banners and furniture on the forecourt

Price history

What a price history shows that a percentage cannot

Weight a price by the days it was charged and most savings shrink. The three-month window the ASA uses, the arithmetic, and how to keep your own record.

Updated 3/11/2026 · 8 min

Photo: Cdanternii · CC BY-SA 4.0 · Wikimedia Commons