During a major California wildfire, my wife and I drove to five different stores looking for an air purifier. Costco. Best Buy. Staples. Home Depot. Lowe's. Every one of them was sold out. The smoke outside was bad enough that the news was telling people to stay indoors. We kept the windows closed, and I could smell the smoke indoors every time I walked from one room to another. My eyes felt itchy all day.
When we finally gave up on the stores and checked Amazon, the purifier we wanted was at full price. No coupon, no flash deal, no price drop. According to every rule I normally follow, it was a terrible time to buy.
I bought it that night. It shipped the next day. It was the best purchase I made all year.
That moment is why I stopped trusting Amazon's "deal" flag as the main signal of whether to buy something. It also changed how I run krazy.deals, where I track over 30,000 active Amazon discounts every day.
Here is what most people get wrong about spotting a real Amazon deal. They look at one signal: the discount percentage. Amazon says 40 percent off, they click buy. If you do that, you are going to spend a lot of money on things that are not actually deals.
A real deal passes three tests, in this order.
Test 1: Utility. Do you actually need it?
The first test has nothing to do with Amazon. It has nothing to do with price. It is a question you ask yourself before you even look at the listing.
Would I care about this product if it was full price?
If the answer is no, stop. Close the tab. You do not need a 70 percent discount on a product that sits unopened in your garage for two years. You need to save your money for something you actually use.
Modern marketing, especially Amazon's, is engineered to make you buy things you never would have wanted on a normal Tuesday. The "frequently bought together" section. The "customers who viewed this also bought" carousel. The urgency banners that say "only 3 left in stock." All of it is designed to move you from passive browsing to active purchasing.
None of it is designed to ask whether you actually need the thing.
This one test, asking "would I want this at full price," eliminates maybe 80 percent of impulse purchases. That is more money saved than any coupon code will ever give you.
Test 2: Context. What is happening in your life right now?
The second test is about the world outside the dashboard. This is the signal Amazon cannot see, because it lives in your own circumstances.
During the wildfire, air purifier availability mattered more than price. We needed the thing now, not in three weeks when prices eventually came down. Paying full price was the right call because the alternative was breathing smoke.
That same logic applies to a lot of life events:
- Back-to-school. Backpacks, lunch boxes, dorm supplies. If your kid starts school in two weeks, waiting for a 40 percent off sale that might never come is the wrong strategy. Buy it now at the best price available today.
- Allergy season. Air purifiers, HEPA filters, allergy medication. When your throat is closing up, price sensitivity goes way down for good reason.
- A new baby. Bassinets, car seats, breast pumps. The timeline is not flexible.
- A recent injury. Crutches, ice packs, compression sleeves. You need it working today.
In all of these cases, Amazon might have no discount flag on the product. The absence of a deal does not mean you should not buy it. It means you are buying in a real-world context that Amazon has no visibility into.
Context can also work the other way. If a product you want will likely go on sale during a known event (Prime Day in July, Black Friday in late November, back-to-school in August), and you can wait, wait. Context tells you whether your timeline flexes or does not.
The failure mode here is treating Amazon data as the only data.
Every shopping decision lives inside a real life, and the real life almost always overrides the numbers.
Test 3: Baseline. Is the price actually a good price?
Only after you have passed the utility test and the context test should you ask the most common question: is this actually a good deal?
Here is the issue. Amazon flags thousands of products as "deals" every single day. Not all of them are deals. In many cases, the listed "original price" that a discount is calculated against has been inflated by the seller. A $100 product that lists at $200 and gets "50 percent off" is a $100 product. You did not save anything.
Contrast that with this tool set, currently 45 percent off against a stable historical price. That discount is real money saved, not marketing theater.
This is where price history matters more than anything else on the listing page.
My rule on krazy.deals is simple: never feature a product unless its current price is at or below its 30-day low. Anything hitting a 365-day low gets flagged as a special deal. Anything hitting an all-time low is rare and worth acting on quickly.
You do not need access to a full deals platform to do this yourself. Two free tools solve the baseline problem for most Amazon shoppers.
Keepa (keepa.com) adds a price history chart directly to every Amazon product page. You install a browser extension, visit a listing, and you can immediately see whether today's price is actually low or whether it is a typical price pretending to be a deal.
CamelCamelCamel (camelcamelcamel.com) does the same thing through a separate website. You paste an Amazon URL in and get the full price history.
Both tools are free. Both are essential. If you buy anything on Amazon without checking one of them, you are flying blind.
The 30-day low is your minimum threshold. Below that, you are getting a real deal. At or above that, you are getting whatever the current price happens to be, dressed up as a deal.
How krazy.deals applies this framework
Every product featured on krazy.deals has already passed tests two and three. Our system monitors over 6,000 Amazon subcategories continuously and flags products hitting their 30-day or 365-day lows. We filter out inflated-baseline fakes, and we cross-check context for seasonal categories like back-to-school or winter gear.
What we cannot do is pass the utility test for you. That is always your job. But we can tell you honestly: yes, this product is at its lowest price in the last 30 days. Yes, this coupon actually stacks. Yes, this deal is real.
Everything else is marketing.
The summary
Every Amazon deal has to pass three tests, in this order, to be worth buying:
- Utility. Would you want this at full price? If no, stop.
- Context. Does your current situation make this urgent or worth paying full price for? If yes, buy now.
- Baseline. Is the current price at or below the 30-day low? If yes, the deal is real.
Most shoppers skip straight to test three and think that is all that matters. The pros work the framework in order, because the first two tests catch more money-saving opportunities than the third one ever will.
The best deal is always the one you did not buy because you did not need it. The second-best deal is the one you bought at full price because you needed it right now. The third-best deal is the discount you caught on something you were going to buy anyway.
Get that order right and you will save more money than any coupon code. That's the filter we run every product through on today's daily deals.