eBay Arbitrage Software and Online Arbitrage Software, Compared

Software is the half of arbitrage that happens before you leave the house. You open a supplier's site or a wholesale list, run the numbers across hundreds of products, and come out with a buy list. That work is a desk job, and it is the only place where a paid subscription earns its money. This page covers the tools sellers actually pay for, what each reads, what each costs as of September 2026, and when the phone in your pocket does the whole job for nothing.

The paid shelf is mostly Amazon software, which is the first thing to understand before you buy any of it. If your question is "which app should I scan with in a store", that comparison lives on the retail arbitrage app page, not here. This page is about sourcing software you run from a browser at a desk, and the free eBay arbitrage scanner that covers the eBay side of the same decision without a subscription.

What eBay arbitrage software actually measures

Most resellers assume "eBay arbitrage software" means software that reads eBay. It usually does not. Tactical Arbitrage, SellerAmp, RevSeller, BuyBotPro and Scan Unlimited all answer one question: can I buy this cheap and sell it on Amazon at a profit after Amazon's fees. Not one of them reports eBay sold prices.

That is structural rather than lazy. Amazon publishes a catalogue with a stable identifier, the ASIN, so a tool can match a retailer's product to a listing, pull a fee schedule and return a profit number automatically. eBay has no equivalent identifier and no public catalogue for third party tools to build on, so automating eBay sourcing would mean scraping it. Almost nobody sells that, which is why most of the software marketed under this name is Amazon software.

The market splits into four shelves, and knowing which shelf a tool sits on is most of the buying decision:

1. Amazon-side sourcing and deal analysis. Extension or web app tools that read Amazon rank, offer counts, fees and profit on a product you are looking at, or across a whole list.
2. In-store clearance lead finders. Tools that tell you where the markdown is and whether a specific store still has units. They do not price the item for you.
3. eBay's own sold-data research. Free with Seller Hub access, and the only first-party source of eBay sold prices.
4. Free browser scanners. No account, no install, they push a code or a keyword into eBay's sold search and hand you the comps.

Pick by the shelf first, the price second. A $69 a month tool from shelf one does nothing for a question that shelf three answers for free.

The oldest warning in this corner of the market still holds, and it is the one the live page got right: when a tool shows you a cached sales rank or a price history that has not refreshed, you are making buy decisions on prices that have already shifted. Live data, or no decision.

The shelf, with September 2026 prices

Every figure above was read from the vendor's own live page on 28 September 2026, with one exception. Keepa blocks automated price checks, so its price comes from two independent trackers reading the same vendor page, and the newer of the two figures is the one quoted here. Zen Arbitrage is not in this table at all: zenarbitrage.co serves a Cloudflare wall, zenarbitrage.com redirects to that wall, and thezenarbitrage.com now redirects to an unrelated spam page, so no live price could be verified this session.

Keepa is the data layer under everyone else

Keepa is the tool the other tools quietly resell. It records Amazon price and sales rank history and shows it as a chart on the product page, and its Product Finder queries the same database by category, rank, price and offer count.

What the free tier gives you is real but narrow: price history charts, the Deals tables, and tracking on a free account. The seller toolkit, which means Product Finder, bulk Product Viewer import and export, and the full Deals rows, sits behind the paid quota system. Keepa Pro is a single plan: EUR 29 a month or EUR 290 a year, billed as twelve months for the price of ten. There is no monthly/annual ladder and no free trial. The API is a separate subscription with its own token metering, starting at EUR 49 a month, and it is not included with Pro.

One practical note before you pay in euros: Keepa bills in euro, so a card in another currency pays a conversion fee the headline price hides. And if all you want is Amazon price and rank history for products you already have open, compare the field first, because several extensions now ship a Keepa-style chart with the analysis on top. Our Keepa alternative page runs that comparison.

Bulk list analysis is where software is not optional

A supplier sends you a 30,000 line CSV. No phone scanner touches that, and no amount of store visits replaces it. This is the workload that justifies a subscription.

Scan Unlimited is the plainest version. The free tier takes one file a month of up to 10,000 products, the paid plan is $70 a month or $60 a month billed annually, and it scans at a claimed 300,000+ products per hour with Keepa charts attached to each result. BuyBotPro does the same job with a scoring model: it returns a buy or skip verdict per line, with the reasons spelled out, from $39.95 a month. Tactical Arbitrage runs the wholesale manifest workflow as part of the Seller 365 bundle from $69 a month, alongside cached searches across 1,400+ retailer sites and a reverse search that starts from an Amazon product and works back to the stores selling it. Its comparison against the tools it replaced is on the Tactical Arbitrage comparison page.

If you source from store websites rather than manifests, the workflow is per product instead of per file. SellerAmp analyses the page you are on, returns fees, ROI, eligibility and IP alerts, and exports to Google Sheets. RevSeller is the narrowest and cheapest version of the same idea at $8.33 a month billed annually, with a variation viewer that is genuinely useful on shoes and clothing. Both are Amazon-side tools. Neither tells you what the item is worth on eBay.

In-store software is a lead source, not a pricing tool

BrickSeek is the tool people mean when they say software found them a deal in a store, and it is worth being precise about what it does. It reports clearance prices and per-store inventory at chains including Walmart, Target, Home Depot and Lowe's on its free tier, and adds historical pricing and nationwide deal alerts on Premium at $19.99 a month or Extreme at $39.99 a month. That is a sourcing lead: it tells you which store and which shelf to visit. It does not tell you what the item sells for, and it never will. You still price it with eBay sold comps or an Amazon rank check before you buy.

The pairing that works is BrickSeek for the lead, a browser scanner for the comps, and a calculator for the margin.

When software beats a phone scanner

• Online arbitrage from a desk. You are analysing a browser tab, not a shelf tag. The tool reads the page you are on, and you never hold the product. A phone scanner has nothing to scan.
• Bulk list analysis. A file with thousands of rows gets filtered once, in one pass, by ROI, rank, price and offer count. A phone cannot do this at any scale.
• Spreadsheet workflows. Buy lists with cost, fees, target resale and a running margin belong in a spreadsheet. SellerAmp exports to Google Sheets, Scan Unlimited and BuyBotPro output lists you can filter, and you reconcile a whole order rather than one item.
• History instead of a snapshot. A Keepa chart shows what an item's price and rank did across months, including the dip you are buying into. A scan shows today.
• Fee and margin math across a whole order. Before you commit $800 to a manifest, you want net profit on twenty SKUs at once. That is desk work, and the eBay fee calculator is the piece to run it through.

When it does not, and what a subscription has to earn

You are standing in an aisle with one item in your hand. Nothing on this page helps you there, and neither does any bulk tool in the table above, because they match retailer websites and supplier files against Amazon rather than reading the shelf in front of you. The comps come from eBay sold listings, the fee math takes ten seconds, and a free browser scanner opens both from a phone without an account. That is the whole toolkit for a clearance rack and a twenty minute walk.

The failure mode worth naming is buying Seller 365 because a video told you serious sellers use it, then using it to look up one item at a time in a browser, which is a slower version of what a free scanner already does. Pay for software when your bottleneck is volume, not when it is the item in your hand.

The break-even test is worth running before any subscription. Seller 365 starts at $69 a month, so $828 a year. If your average net profit per flip is $12, that is 69 extra flips a year, about 1.3 a week, just to break even. At $25 per flip it is 33 flips. A $19.95 SellerAmp plan needs 20 flips a year at $12. Count your flips for a month first. If two bad buys a month is your error rate, the paid tools pay for themselves.

There is one more case against paying. If your resale marketplace is eBay, Amazon-side software answers a different question than the one you are asking. Keepa history and SellerAmp ROI are useful for the buy, but the sell side is eBay sold data, from eBay's own research or a free scanner.

Start free, then pay for the shelf you actually use

The free options on this page are not demos. eBay Product research gives Seller Hub users eBay sold prices with date ranges up to three years and filters by UPC, ISBN or MPN on the Research tab. Keepa's free tier gives price history charts on any Amazon product page. BrickSeek's Basic tier gives local inventory checks. Scan Unlimited takes a free file a month. A free browser scanner like Thrifty Flipper covers eBay sold comps, Amazon rank and a profit calculator with no account, on a desktop or a phone, with the same tool on Google Play as ThriftyFlipper if you want an icon.

Run that shelf for a month. Upgrade when a specific workload, a manifest, a hundred product shortlist, or eligibility checks on a whole category, is what you do every week. How far the free options stretch on their own is the subject of free reselling tools, and the end to end buy-on-one-marketplace, sell-on-the-other workflow is written up in the Amazon to eBay arbitrage guide.

Keep going from here: Amazon to eBay Arbitrage: Why You Need the Right Software best apps for retail arbitrage keepa alternative for arbitrage.