Prices and availability are tracked for France (amazon.fr and French retailers, in euros).
The fake discount barometer
A crossed-out price does not tell you whether you are getting a deal. This barometer compares, across the whole tracked catalog, the discount displayed by the retailer with the real discount against the product’s usual price.
Computed on October 13, 2026 over 2124 purchasable products tracked daily.
How it is computed
For each product, DeaLynx records the price every day and computes its usual price: the median of displayed prices over six months, weighted by how long each price stayed online, outlier readings excluded. A “displayed” promo is a product whose retailer shows a list price above today’s price.
A promo counts as fake when today’s price stays at 98% or more of the usual price: the announced discount saves nothing versus what the product usually costs. It counts as real when today’s price is at least 5% below the usual price. In between, the discount is marginal.
By category
| Category | Tracked products | Displayed promos | Share of real discounts |
|---|---|---|---|
| Électroménager | 413 | 127 | 35 % |
| Informatique | 245 | 81 | 32 % |
| Maison & Déco | 197 | 29 | 52 % |
| Téléphonie | 150 | 44 | 41 % |
| Sport & Loisirs | 150 | 27 | 52 % |
| Jeux & Jouets | 132 | 70 | 39 % |
| Jeux vidéo | 130 | 29 | 28 % |
| Jardin & Bricolage | 128 | 35 | 43 % |
| Image & Son | 108 | 42 | 33 % |
| Électronique | 76 | 28 | 57 % |
| Cuisine | 73 | 20 | 70 % |
| Beauté & Santé | 63 | 12 | 67 % |
| Bébé & Puériculture | 59 | 31 | 32 % |
| Animalerie | 48 | 14 | 57 % |
| Mode & Accessoires | 32 | 14 | 57 % |
| Auto & Moto | 22 | 4 | — |
Week after week
- 7 sept.19 %
- 14 sept.23 %
- 21 sept.21 %
- 28 sept.20 %
- 5 oct.20 %
- 12 oct.20 %
Share of tracked products at least 5% below their usual price, recorded every Monday. Shopping events (French Days, Black Friday, sales) can be read here without the noise of list prices.
Monthly archives
Each month has its own page, with its readings and real price drops: a stable, dated source to cite.
Journalist, creator, consumer association: this data may be freely quoted with a link to this page, and we can provide category or retailer breakdowns on request.