Storefront stalking works like this: you find one profitable product, look at the successful seller behind it, and go through that seller's whole catalog for more. If a seller has one product that meets your criteria, they've already done the research, and they probably have a dozen more like it. Amazon arbitrage sellers have used this method for a decade. This guide shows how to use it on Walmart Marketplace, where hardly anyone does yet.
Disclosure: I build WallScout, a Walmart research tool. The technique below works with or without any particular tool.
What is storefront stalking?
On Amazon, storefront stalking (also called reverse sourcing or seller tracking) has been a standard sourcing method for over ten years. Instead of hunting for products one at a time, you find sellers who are consistently profitable and look at what they sell. They took the purchase risk and did the analysis; you confirm their results with data and decide whether to sell the same products.
It works especially well because a small number of sellers carry a large share of the good products. Follow the right 20% of sellers and you'll have a steady flow of leads without browsing blindly.
On Amazon this technique is everywhere. On Walmart almost nobody uses it, and with lower competition and fewer tools, the sellers who do have a real advantage. (More on why Walmart rewards research in is online arbitrage dead.)
Why it works even better on Walmart
First, seller catalogs are public. On a Walmart product page, the "Sold & shipped by" seller has a storefront with a "Shop all" view of everything they sell. Find the seller holding the Buy Box on a product you like, click into their store, and their whole catalog is two clicks away.
Second, fewer sellers are chasing the same leads. On Amazon, thousands of sellers run storefront-stalking tools against the same popular sellers, so good leads get crowded fast. On Walmart that competition is a fraction of the size, and the sellers you follow haven't been picked clean.
The workflow on Walmart
Step 1: start with one good product
Pick a product that already meets your criteria, either one you've sold profitably or one your research flagged. Ideally it has at least 3 other sellers on the listing, which tells you it sells and that experienced resellers are on it. (How to spot a good product in the first place.)
Step 2: find the seller behind the Buy Box
Look at who holds the Buy Box (the default "Add to cart" seller) and who else is on the listing. Each seller name links to a storefront. Favor sellers whose name isn't a brand. A generic "LLC" selling across many categories is almost always a reseller doing arbitrage or wholesale, which is the kind of catalog you want.
Step 3: open their full catalog
Go into the storefront and use "Shop all" to see the whole range. One reseller's catalog can contain dozens of products they've already backed with their own money. A big catalog is also a good fit for bulk analysis instead of checking items one by one.
Step 4: check every candidate
Beginners skip this step. A product sitting in a good seller's catalog is only a lead, so run each one through your real criteria:
- Estimated monthly sales. Is there real demand, with enough data behind the estimate to trust it?
- Seller count. Is the listing still winnable, or already crowded?
- Real profit after fees. 2026 Walmart referral fees (6 to 20%, usually 15%), WFS fulfillment and storage. (Full fee breakdown.)
- Sourcing. Can you buy it again and again?
The best targets are replenishables and wholesale products, which a seller sources repeatedly. One-off "hot" products usually crash in price before you get there.
Step 5: keep following the best sellers
When you find a seller with a strong catalog, keep watching them. Each new product they add is a lead another seller has already judged worth buying. Following sellers over time is what keeps the leads coming week after week.
WallScout's Product Finder and analysis tools let you check a whole seller's catalog against your criteria quickly, with estimated sales, competition and real-fee profit, and with unreliable estimates filtered out. Try it free at wallscout.io.
What it gives you, and its limits
The big benefit is that your competitor did the work. They analyzed the product, took the purchase risk and showed it sells. You confirm the outcome with data and skip the blind hunting, and on Walmart you also face less competition while doing it.
The limits:
- You still have to check every lead. Copy a catalog without checking demand, competition and fees and you'll copy the other seller's mistakes too.
- Hot products don't work well. By the time you've sourced an item with an inflated price, the price has usually dropped or the sale is over. This method works best on steady replenishables.
- You won't see exact numbers. Walmart doesn't publish sales data, so you're working with estimates. Trust them more when there's more data behind them, and be skeptical of confident numbers on thin data.
Frequently asked questions
What is storefront stalking? It's a product research technique where you find a profitable product, identify the successful seller behind it, and go through that seller's whole catalog to find more products to sell. It's also called reverse sourcing or seller tracking, and it lets you build on research other sellers have already done.
Does storefront stalking work on Walmart? Yes, arguably better than on Amazon. Walmart storefronts show a full "Shop all" catalog publicly, so it's easy to see everything a seller offers, and far fewer sellers use the technique on Walmart, so the leads are less picked over.
Is storefront stalking against the rules? Looking at public seller storefronts and the products they sell is normal marketplace research, since the catalogs are visible to anyone. What matters is how you source and sell: you still have to buy products legally through channels you can reorder from, and respect brand and category restrictions.
What products work best for reverse sourcing? Replenishable and wholesale products, the items a seller sources and sells again and again. One-off "hot" products with temporarily inflated prices are poor targets, because the price usually drops or the opportunity disappears before you can source and list them.
Turn a good seller's catalog into your shortlist. Try WallScout free for 7 days.