Everyone assumes Amazon is cheap. Amazon has built its entire brand on that assumption. But is it actually true?
We ran 50 of the most popular products across 10 categories through a price tracker for 90 days. We recorded the price every single day. We compared what buyers actually paid to what the product was worth based on its price history. The results are not what most people expect.
🚨 What we found: On any given day, the majority of Amazon shoppers are paying above the 90-day average price for the products they buy. Amazon is cheap — but only if you know exactly when to buy.
The Methodology
We selected 50 products across 10 categories — 5 products per category. All products had to be genuinely popular items with significant sales volume. We tracked each product's price every day for 90 days using Zroppix and verified the data against CamelCamelCamel price history records.
For each product we calculated:
- The 90-day average price
- The percentage of days the price was above the average
- The highest vs lowest price spread (how volatile the pricing was)
- Whether "sale" prices were genuinely lower than the average
The categories we tested: Electronics, Amazon Devices, Apple Products, Headphones, Kitchen Appliances, Home Goods, Books, Clothing, Health and Beauty, and Pet Supplies.
Check if you're overpaying right now — free
Zroppix shows you the 90-day price history on any Amazon product and tells you instantly whether the current price is good or not.
The Results by Category
| Category | Days Above Average Price | Price Spread | Verdict |
|---|---|---|---|
| Clothing and Fashion | 71% of days | Up to 45% | Worst |
| Health and Beauty | 64% of days | Up to 38% | Very Bad |
| Pet Supplies | 61% of days | Up to 35% | Very Bad |
| Home Goods | 54% of days | Up to 29% | Caution |
| General Electronics | 52% of days | Up to 33% | Caution |
| Kitchen Appliances | 48% of days | Up to 27% | Caution |
| Headphones (premium brands) | 44% of days | Up to 31% | Moderate |
| Books | 41% of days | Up to 18% | Moderate |
| Apple Products | 38% of days | Up to 24% | Better |
| Amazon Devices | 31% of days | Up to 55% | Best |
The Amazon Devices result is interesting — prices are above average only 31% of days, but the price spread is enormous (up to 55%). This means when Amazon Devices are cheap, they are very cheap. But when they are not on sale, they can be significantly overpriced.
The 5 Most Shocking Findings
Clothing prices were above average 71% of the time
Fashion was by far the worst offending category. On 71 out of every 100 days, the prices we tracked were above the 90-day average for that product. Buying clothing on Amazon at a random time means you are overpaying more often than not. Only buy clothing at the end of season clearance or during verified sale events.
The same product showed different prices on different devices
In 12 of the 50 products we tested, we found meaningful price differences when checking the same product on a phone vs a desktop computer vs a private browser window. Amazon's dynamic pricing algorithm uses device type and browsing history as pricing signals. The differences ranged from 3% to 18% — significant on any purchase over $50.
"Sale" prices were genuinely lower only 54% of the time
We tracked 23 instances where a product in our test group received a sale badge, deal badge, or Lightning Deal label over the 90-day period. In only 12 of those 23 instances — 54% — was the "sale" price actually lower than the product's 90-day average price. In the other 46% of cases the "sale" price was at or above the average. The deal badge was decoration, not a genuine saving.
Pet supplies spiked dramatically before subscription renewal periods
Of all the surprising findings, this one caught us off guard. For Subscribe and Save pet products we tracked, prices frequently increased in the days immediately before subscription renewal dates — meaning subscribers were automatically charged more than the regular sale price for the same product. The average overcharge was 11% above the non-subscription sale price.
Amazon Devices were genuinely the best value — but only at the right time
Amazon's own products — Echo, Kindle, Fire TV, Ring — showed the most dramatic and genuine price drops of any category. During Prime Day and Black Friday, these products hit prices 40-60% below their average — genuinely historic lows. But outside of sale events, they were priced above average 31% of the time. Timing matters enormously for this category.
Know the real price before you buy anything
Zroppix checks 90 days of price history on any Amazon product and tells you instantly whether today is a good day to buy or whether to wait.
Key Numbers From The Test
What This Means For You
Amazon is not trying to rip you off in a deliberately malicious way. It is simply using an extraordinarily sophisticated pricing algorithm designed to maximize revenue at every moment — and that means pricing products at whatever the market will bear, not necessarily at the best price for you.
The conclusion from 90 days of tracking 50 products is clear: buying on Amazon at a random time means you will overpay more often than not in most categories. The exception is Amazon's own devices during verified sale events — those are genuinely the best deals on the platform.
The solution is not to stop shopping on Amazon. It is to never buy without checking price history first. The price history tells you everything Amazon does not want you to know — what the product has actually sold for over time, and whether today is a good day to buy or whether waiting will save you money.
You can check any product's price history in 5 seconds using Zroppix. You can also read our full guide on the 7 psychological tricks Amazon uses to make you overpay and how to check if any Amazon deal is actually good.
The Simple Rule That Changes Everything
After 90 days of tracking 50 products, one rule stands above all others:
Never buy anything on Amazon without checking the price history first.
That single habit — checking before buying — would have saved the average Amazon shopper $47 per product in our test. Across a year of shopping that compounds into hundreds of dollars.
Check before you buy. Every time.
Zroppix shows you the real 90-day price history on any Amazon product and gives you an instant BUY or WAIT verdict. Takes 5 seconds. Free forever.
✦ 90 days of real price data · ✦ Instant BUY or WAIT verdict · ✦ 83% AI prediction accuracy
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