When a competitor's price isn't comparable to yours
Almost every pricing decision starts with someone else’s price. You look at what a competitor charges, compare it with your own, and decide whether to make a change. The problem comes before the math: the figure you noted for the competitor never stands alone. It comes with a seller, a delivery area, packaging, and a product—and if even one of those four differs, the comparison is no longer meaningful.
It’s not a lack of care on the researcher’s part. It’s how different channels display prices, each in its own way. And the cost of getting it wrong is very real: if you cut your margin to compete with a price that wasn’t actually your competitor’s, you lose margin without gaining a competitive edge.
What Makes Two Prices Comparable
Before opening the spreadsheet, it helps to define what you are comparing. Two prices are comparable when they are:
- for the same product, not one of its accessories;
- of the same package size, in the same quantity;
- from the same seller you want to track, not the channel that handles delivery;
- from the same delivery location, because price and delivery time vary by location;
- at the same time, because marketplace prices change throughout the day.
Each item on this list represents a different way tracking can go wrong without looking wrong. Let’s examine them one at a time.
The sender isn't the seller
On a marketplace listing page, “sold by” and “shipped by” often appear side by side with the same visual prominence. Only the first identifies the competitor. The second identifies the party handling logistics, which is often the marketplace itself.
Recording the second means treating the marketplace as if it were the company competing with you on price—and worse, recording a name that appears across listings from different sellers, making the table look consistent precisely where it is not.
The same page covers a second scenario: the same listing has more than one price, and the delivery address determines which one appears. Checking from a different location each week mixes changes made by the competitor with changes in your point of view, making a tracking spreadsheet look wrong when it is not. Those who record the location they checked from can tell the two apart; those who do not are left with a series that fluctuates for no apparent reason. Both scenarios are explained in detail on the page about monitoring competitor prices on Amazon.
The link you copied may not be for the listing
On channels with sponsored ads, the URL embedded in the ad card is not the product page URL: it is used to track clicks. When copied and pasted, it opens in the browser and looks correct—which is why the error can go unnoticed for months.
Weeks later, when someone follows that link to check the price, it may lead to another listing, the seller’s storefront, or nowhere at all. Manually maintained spreadsheets are especially vulnerable to this because the link is precisely the part no one reviews. The solution is to open the listing and copy the URL from the browser’s address bar instead of the link embedded in the card.
With automated tracking, the question is different: the click URL contains information identifying the listing it tracks, which can be read and replaced with the product page URL. That is why pasting the link from the card usually works there. The structure of both URLs, as well as the case where even this is not possible, is explained on the page about tracking competitors’ prices on Mercado Livre.
The cheapest item on the list is usually the smallest pack
Sorting results by price is often a shopper’s first instinct, but it puts the lowest-priced listing at the top—which is almost always the smallest quantity. A 180 g package priced at R$ 14.90 is not cheaper than a 1 kg package at R$ 59.90: it contains about one-fifth as much and costs more per gram.
In grocery and wholesale, this is not the exception—it is how catalogs are structured: the same item appears as a single unit, a multipack, and a case, all in the same list of results. The exact listing title is what distinguishes them, because that is where the package size is specified—which is why a tracking table without listing titles makes it impossible to verify the data. Learn more on our grocery and wholesale price monitoring page.
The Closest-Matching Listing May Be an Accessory
An accessory uses the same terminology as the part it goes with. Search for "brake pad," and the results include pads, wear sensors, and caliper covers—and sometimes the accessory is the closest word-for-word match to the search term.
For pricing teams, the impact is clear: an accessory may cost a fraction of the part itself, and including even one such listing in the average can drag your price down to a level no competitor offers. Filtering these listings manually is manageable with ten products but impossible with a thousand. That is why, with automated tracking, every listing found receives a similarity score against the registered product—and the caliper cover ends up at the bottom of the list, even if it is the closest textual match. You can see an example of these scores on the auto parts price monitoring page.
What You Can Do with This Today
If you only have a few products, the five checks above are enough: record the seller separately from the shipper, note where you found the information, save the listing title along with the price, and copy the URL from your browser’s address bar. It takes time, but it works.
What doesn’t scale is the repetition. Running the same five checks every week across dozens or hundreds of items is a workload no sales team can sustain for long—and that’s exactly when monitoring quietly turns into an outdated spreadsheet that no one trusts enough to use for decision-making.
We built RevScan, our competitor price monitoring service for marketplaces, to handle that repetition: it scans the channels you choose, distinguishes your product from accessories, identifies each seller and their listed price, and delivers everything with the title, date, and link for verification. If you want to see how this would work for your catalog, talk to us.
