Keepa is one of the most valuable tools in an Amazon seller's toolkit. It tracks the price and sales rank history of almost every product on Amazon, giving you the data you need to make informed buying decisions. Here is how to use it effectively.
What Keepa Does
Keepa continuously monitors every product on Amazon and records its price, sales rank, number of sellers, and Buy Box winner over time. This data is displayed as charts that you can view on Amazon product pages (via the free browser extension) or through Keepa's website and app.
While the free version shows basic price tracking, the paid subscription (approximately £17 per month) unlocks the full sales rank history and advanced features that most serious sellers consider essential.
Reading the Price Chart
The Keepa chart shows multiple lines representing different price points. The orange line shows the Amazon price (when Amazon is selling the item). The blue line shows the lowest third-party new price. The black line shows the lowest third-party used price. And the green area shows the sales rank.
What you want to see is price stability. If the Amazon price has been stable at £20 for six months, you can be confident selling at that price point. If the price has dropped from £20 to £12 over the past three months, the product may be in decline — or heading for a price war.
Understanding the Sales Rank Graph
The sales rank (BSR) graph is arguably the most important part of Keepa. The green line shows how the product's sales rank has changed over time. Remember that a lower sales rank means more sales — so drops in the graph (the line going down) indicate sales happening.
A product with frequent, regular dips in sales rank is selling consistently. A product with an almost flat line at a high BSR is barely selling. The frequency and depth of those dips tell you how often and how quickly the product moves.
What Good Keepa Data Looks Like
An ideal product for sourcing shows a stable or slightly increasing price over the past 3–6 months, a sales rank that regularly dips (indicating consistent sales), and a manageable number of sellers without dramatic increases in competition.
Red flags include a sales rank that has been climbing steadily (demand is falling), a price that has been dropping consistently, or a recent surge in the number of sellers (more competition incoming).
Using Keepa for Buy Decisions
Before buying any product for resale, pull up the Keepa chart and ask yourself three questions. First, has the product been selling at or above your target price consistently for the past 90 days? Second, is the sales rank showing regular sales activity? Third, is the competitive landscape stable — not suddenly flooded with new sellers?
If the answer to all three is yes, the product is worth serious consideration. If any answer is no, proceed with caution or move on to the next opportunity.
Keepa Deals and Product Finder
Keepa's paid features include a Product Finder tool that lets you search for products matching specific criteria — price range, sales rank range, category, number of sellers, and more. This is enormously useful for wholesale sellers looking for products to source in bulk.
The Deals section shows products that have recently dropped in price, which can flag opportunities for arbitrage. Set up alerts for specific products or price thresholds, and Keepa will notify you when conditions are met.
Integrating Keepa Into Your Workflow
Install the browser extension so that Keepa charts appear automatically on every Amazon product page you visit. Make it a habit to check the chart before making any sourcing decision. Over time, reading Keepa data becomes second nature — a quick glance tells you whether a product is worth investigating further.
Keepa does not make decisions for you, but it gives you the historical data to make informed ones. Combined with your own analysis of fees, margins, and competition, it is an essential part of the Amazon seller's toolkit.