That '$399 → $299' banner is often a fake discount. Here's how to use 90-day price history to tell a real deal from an inflated 'sale' — and never overpay again.
You've seen it a thousand times: a product listed at $399, slashed to $299, with a countdown timer and a 'lowest price ever!' badge. It feels urgent. It feels like a win. And very often, it's neither — the $399 'original' price is one the retailer almost never actually charged.
This is the single most common manipulation in online retail, and it works because shoppers anchor to the higher number. Once you've seen $399, paying $299 feels like saving $100 — even if the product has sold for $299 (or less) for the last three months.
The fix is simple: ignore the strike-through price entirely and look at the price history. A genuine discount is a price that's actually below the recent average. A fake one is a 'sale' price that matches what the item normally costs anyway.
A 90-day window is the sweet spot. It's long enough to capture the item's true baseline and any recent promotions, but short enough that the data reflects current pricing rather than a launch price from a year ago.
A discount is only real if the price is actually lower than usual. The percentage off means nothing without the baseline.
Inflated reference pricing is effective and, in many places, only loosely regulated. A high 'was' price increases perceived savings, urgency timers manufacture pressure, and 'lowest price' badges borrow credibility. None of it has to reflect what you'd otherwise pay.
The same product also swings in price across retailers at the same moment — so the 'deal' at one store can be beaten by the everyday price at another. Checking one listing's discount in isolation misses this entirely.
Manually pulling up price history for every product is tedious. Cartlyt does it in one step: search in plain English, and every result shows its 90-day price history alongside a TrustScore that grades price authenticity, review trustworthiness, and seller reputation. When a 'sale' is above the typical range, you'll see it flagged before you click — and you can set an alert to buy only when the price hits a genuine low.
Best of all, Cartlyt takes zero affiliate kickbacks, so nothing is nudged up the rankings because a retailer paid for it. The price you see is the honest one.
One AI search compares verified prices across 40+ retailers, with TrustScores and 90-day price history. Free to start.
Try Cartlyt freePrice Arbitrage: Why the Same Product Costs Wildly Different Prices
The exact same product, same day, can vary by $80+ across retailers. Understanding why is how you stop overpaying.
How to Spot Fake Reviews (Before They Cost You Money)
A 4.7-star average can hide a flood of fake reviews. Here are the patterns that give them away.