The smallest workable stack for a beginner in Amazon online arbitrage is three tools bought in a specific order: Keepa for price and sales rank history, then an analyzer like SellerAmp SAS at $19.95 per month to do the fee and ROI math on a product page, then a lead-sourcing tool like Arbitrage Stalker at $29 per month once you can already tell a good deal from a bad one. Total to start is under about $60 a month. The order matters more than the brands. Buying lead flow before you can evaluate a lead is the single most common way new sellers waste money, because more deals just means more chances to buy the wrong thing faster. Prices below are as of August 2026.
Disclosure: I build Arbitrage Stalker, which is third on that list on purpose. It is not the tool you need first, and I would rather tell you that than sell you a subscription you will cancel in six weeks.
Buy in this order, and know why
New sellers tend to buy tools in the reverse of the useful order. They start with the thing that promises deals, because finding deals feels like the hard part. Then they buy deals they cannot properly evaluate, lose money on a few, and blame the tool.
The actual dependency chain runs the other way.
- You cannot evaluate a deal without history. A product's current price tells you almost nothing. What you need is what it has done over months: how the Buy Box price has moved, how sales rank has behaved, how many sellers have been on it. That is Keepa.
- You cannot evaluate a deal quickly without an analyzer. You can do fee and ROI math by hand. You will not keep doing it by hand across a hundred products. That is SellerAmp or a similar analyzer.
- Only now does lead flow help you. Once a good lead and a bad lead look different to you, more leads is straightforwardly more money. Before that, it is not.
What each one does
Keepa: the history layer
Keepa records price and sales rank over time for Amazon products, and it is the data underneath essentially every serious sourcing decision in this industry. It answers "what has this actually done," which is the only question that separates a real deal from a trap.
There is a free tier that covers charts on product pages, which is enough to learn on. The paid subscription unlocks the wider data access and product finding. Keepa prices in euros and adjusts its tiers periodically, so check keepa.com for the current number rather than trusting a figure in an article.
Learn to read the chart before you spend anything else. Our guide to reading Keepa graphs walks through what actually matters on one.
SellerAmp SAS: the analyzer
SellerAmp turns a product page into an answer. Profit calculator with Amazon's fees applied, ROI, eligibility and IP alerts, Buy Box analysis, historical charts, in a Chrome extension with web and mobile apps.
Pricing is $19.95, $29.95, and $49.95 per month, all three tiers sharing the same feature set and differing on usage, with a 14-day free trial. For a beginner the entry tier is fine.
The reason an analyzer matters so much early is that it makes your mistakes visible. When the math is automatic, you stop guessing at fees and start noticing the patterns in what you almost bought.
Arbitrage Stalker: the lead flow
Once you can evaluate deals, your problem becomes volume. Manual scanning has a brutal hit rate, because most of what you look at fails on margin, velocity, or Buy Box competition, and you only find out after spending minutes on each one.
Arbitrage Stalker watches around 1,900 seller storefronts and catalogues roughly 342,000 products. You pick proven sellers to track, and when one adds a product or restocks, it hits your feed and pings Discord, Slack, or Telegram in under 90 seconds. Feeds are capped by plan and tied to sellers you choose, so your finds are not going out to hundreds of people at once. Apex, the buy-or-pass call, runs the demand and profit math on every lead before you spend anything.
Plans are $29, $59, and $239 per month with a 7-day trial that requires a card. The $29 Scout tier is the beginner entry point.
Threecolts Seller 365: later, not now
Seller 365 bundles ten tools including Tactical Arbitrage, InventoryLab, ScoutIQ, Scoutify, ScoutX, SmartRepricer, and the FeedbackWhiz products. Reseller pricing starts at $69 per month for one user, $129 for teams up to ten, $199 for the Pro tier, on a 14-day trial. Worth noting that tacticalarbitrage.com/pricing now redirects there, which surprises sellers who have been away for a while.
It is a real value bundle. It is also a lot of surface area for someone who has not sold their first hundred units. Accounting and repricing tools solve problems that only exist at volume. Come back to it when you have that volume.
The stack by budget
| Budget | Stack | What you give up |
|---|---|---|
| $0 | Keepa free tier plus Amazon's FBA revenue calculator | Speed. This works, it is just slow. |
| ~$20/mo | Keepa free tier plus SellerAmp entry | Lead flow. You are sourcing manually. |
| ~$50-60/mo | Keepa paid plus SellerAmp plus Arbitrage Stalker Scout | Not much, for a beginner. This is the sweet spot. |
| $100+/mo | Add bulk scanning or a bundle | Nothing, if you have the volume. Money, if you do not. |
The mistakes that cost the most
Buying lead lists first. A shared list is the opposite of an edge. The moment a lead goes to hundreds of subscribers, everyone hits the same supplier, retail stock disappears or gets bid up, and the Amazon price collapses as everyone lists together. You also learn nothing, which matters more than the money at this stage.
Buying a bundle before you have the problem. Ten tools is not ten times better than two tools. It is ten interfaces to learn while you are still learning the actual business.
Skipping the analyzer to save $20. This is the worst trade on the list. The analyzer is what stops you buying a product where Amazon shares the Buy Box, or where fees eat the margin you thought you had.
Confusing activity with progress. Scanning for six hours and finding nothing is not work, it is a broken process. If that is your week, the fix is a better sourcing method, not more hours. Our online arbitrage workflow lays out the full loop.
Start here
If you have not sold anything yet: Keepa free tier, SellerAmp entry, and source manually for two weeks. Learn what a good chart looks like with your own money on the line.
If you are selling but cannot find enough deals: that is the point where lead flow pays for itself, and where a storefront tracker does more for you than another analyzer will.
Let the deals come to you
Arbitrage Stalker watches proven storefronts, scores every lead against your numbers, and tracks each deal to sold and rebuy. Capped feeds keep your finds exclusive.
Start your 7-day free trial