Question 1

What is online arbitrage?

Accepted Answer

Online arbitrage is the practice of buying products at a low price from one online retailer and reselling them at a higher price on a different marketplace — most commonly Amazon. The model exploits a price gap that already exists between channels: a clearance item on Walmart.com, an overstocked SKU on a niche retailer, or a couponed bundle on Target.com can sell for substantially more on Amazon, where Prime shipping and buyer trust support a premium. Unlike private label, you are not creating a brand. Unlike dropshipping, you actually own the inventory and (typically) send it into Amazon FBA so the marketplace handles storage, packing, and customer service. A healthy online arbitrage flip targets 25–40% ROI after Amazon fees, prep, and inbound shipping, with sell-through under 90 days. The appeal is speed: you can source, buy, and ship a profitable SKU within a single day, and your capital recycles every few weeks rather than every few quarters. The risk is that price gaps close — which is why verification with tools like Keepa is non-negotiable. See our roundup of vetted leads on the Arbitrion homepage to get a feel for what real online arbitrage opportunities look like in practice.

Question 2

How does online arbitrage work?

Accepted Answer

Online arbitrage works as a five-step loop that repeats every time you source. First, you find a candidate lead — either by hunting deal sites and retailer clearance pages yourself or by pulling from a curated daily list. Each candidate needs a source URL, source price, target ASIN, and a target Amazon sell price. Second, you verify the lead against Keepa: a 90-day chart confirms the Buy Box has held at or above your target price, that sales rank is stable, and that the number of FBA sellers is not exploding. Third, you run the ROI math. Plug the source price, prep cost, inbound shipping, and Amazon's referral plus FBA fees into a calculator, and reject anything below your minimum ROI and minimum dollar profit. Fourth, you check restrictions inside Seller Central — confirming you're ungated in the brand and category before you spend a dollar. Fifth, you place the order, route the units through a prep center (or your own garage) for poly-bagging, labeling, and bundling, then create the FBA inbound shipment. Once Amazon receives the units, the Buy Box rotates to you and the flip turns into cash within days or weeks.

Question 3

How to start online arbitrage on Amazon

Accepted Answer

Starting online arbitrage on Amazon takes about a week of setup and a small float of working capital — usually $500–$2,000 for your first batch of inventory. Begin by opening a Professional Amazon Seller account ($39.99/month), which unlocks Buy Box eligibility and category approvals. Next, set up the two tools you cannot skip: a Keepa subscription for price and rank history, and an FBA fee calculator (Amazon's free version is enough on day one). Add a basic bookkeeping spreadsheet so you actually know your real per-unit profit instead of guessing. Then pick a sourcing input — either commit to 10–15 hours per week hand-hunting deals across retailer sites, or subscribe to a curated lead list so the research is done for you. Run your first 10 candidates through the full verify-ROI-restrictions loop before buying anything, even if it feels slow. Place a small first order — 5 to 10 units across two or three SKUs — and ship it into FBA so you learn the prep, labeling, and inbound flow on low-risk inventory. Once that batch sells through, scale up SKU count and per-SKU quantity. See our recommended tools for the full starter stack.

Question 4

How to find online arbitrage deals

Accepted Answer

There are three reliable ways to find online arbitrage deals, and most successful sourcers use all three in rotation. The first is direct retailer scanning: open the clearance, outlet, and sale pages of major sites — Walmart, Target, Home Depot, Lowe's, Kohl's, Best Buy, Macy's — and work through them systematically, scanning UPCs against Amazon and Keepa. This is slow but turns up exclusive deals nobody else is buying. The second is deal aggregators and cashback stacking: sites like Slickdeals, Rakuten, TopCashback, and brand-specific promo trackers surface flash discounts, and stacking a coupon with a cashback portal often turns a break-even SKU into a 35% ROI flip. The third — and by far the highest leverage per hour — is a curated lead list: a vetted daily feed where someone else has already run the Keepa check, ROI math, and restriction sniff test. Whichever channels you use, the discipline is the same: never buy on the current Buy Box alone, always verify the 90-day Keepa price, watch the offer count for sudden spikes, and confirm you're ungated before checkout. The deals are out there every single day; the bottleneck is filtering, not finding.

Question 5

How to find online arbitrage products

Accepted Answer

Finding profitable online arbitrage products is a filtering problem, not a discovery problem — thousands of SKUs are mispriced across retailers right now, and your job is to surface the ones that pass every test. Start by defining the box you'll buy inside: a minimum ROI (most sourcers anchor at 30%), a minimum dollar profit per unit ($3–$5), a maximum Best Sellers Rank you'll accept in each category, and a hard rule on offer count (e.g. no more than 8 FBA sellers). Then run candidates through Keepa: the 90-day Buy Box average must support your target price, sales rank must be stable, and the offer-count chart must not show recent spikes — a sudden jump from 3 to 14 FBA sellers usually means the lead was shared widely and the price is about to crater. Cross-check brand restrictions inside Seller Central before you ever click buy. Avoid IP-sensitive brands (Nike, Disney, Apple), heavy or oversized items in your first 90 days, and anything with melt, leak, or expiration risk. Tools like our Keepa-verified daily leads collapse this filtering work — every product on the list has already passed the Keepa, ROI, and restriction checks before you see it.

Question 6

Is online arbitrage allowed on Amazon?

Accepted Answer

Yes — online arbitrage is allowed on Amazon, and it has been a legitimate sourcing model since the marketplace launched third-party selling. The legal foundation is the first-sale doctrine: once you buy a genuine product from an authorized retail channel, you have the right to resell it. Amazon's own Seller policies explicitly permit reselling new, authentic products as long as you meet condition guidelines, supply proper invoices when requested, and respect brand and category gating. That said, 'allowed' is not the same as 'unrestricted.' Amazon requires that invoices for ungating come from a wholesale or authorized retail source — and many brands now require explicit written authorization to list. Some brands are effectively closed to arbitrage sellers because of repeated IP complaints. You also must follow condition rules (new means new — sealed, undamaged, no missing accessories), label correctly for FBA, and never mix used or returned units into new inventory. Sellers who get suspended almost always violate one of these specific rules, not the broader arbitrage model itself. Stick to authentic products from legitimate retailers, keep clean invoices for every purchase, and verify brand approval before you buy, and online arbitrage remains a fully compliant way to build an Amazon business.

Online Arbitrage Guide: 6 Questions Answered