Online arbitrage sounds complicated. It's not.
Here's the simplest explanation: you buy something cheap at one store and sell it for more on another platform. The price difference, minus fees, is your profit.
The Basic Idea
Retail stores discount products for all kinds of reasons — seasonal inventory clearance, overstocks, model changes. When a store wants to clear shelf space, prices drop fast.
Meanwhile, those same products may be selling at full price (or near it) on Amazon, where millions of people shop every day.
Online arbitrage sellers bridge that gap. They find the discounted products, buy them, and list them on Amazon.
How It Actually Works: Step by Step
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Source products. Browse Walmart.com clearance, walk store aisles, or use a tool to scan products quickly. You're looking for products priced significantly below their Amazon selling price.
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Check the numbers. Before buying, verify the Amazon selling price, calculate fees, and confirm the profit margin is acceptable (usually 30%+ ROI).
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Buy the inventory. Purchase at the retail store — physical or online.
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Send to Amazon FBA. Ship your inventory to Amazon's warehouse. Amazon handles storage, packing, and shipping to customers.
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Collect the profit. When a customer buys your listing, Amazon deposits your earnings (minus fees) into your seller account every two weeks.
That's it. No product creation, no manufacturing, no private label. You're moving existing products from places where they're cheap to a marketplace where people want to buy them.
Why Walmart?
Walmart is the most common source for OA beginners because:
- Volume of clearance. Walmart has enormous inventory and regular markdown cycles. Clearance happens predictably.
- Walmart.com is searchable. You can browse clearance deals from home without driving to a store.
- In-store edge. When you source from physical Walmart stores, you have access to local clearance that competitors can't reach remotely.
Other popular OA sources: Target, Home Depot, Costco, Kohl's. But Walmart is the most consistent starting point.
Is Online Arbitrage Passive Income?
No. Online arbitrage requires active work — sourcing products takes time, and managing inventory requires attention. It's closer to a part-time job than passive income.
That said, it's one of the more accessible ways to start an Amazon business. You don't need to invent a product, build a brand, or negotiate with overseas manufacturers. The operational knowledge required is learnable in weeks.
Some sellers do OA part-time and make a few hundred dollars a month. Others do it full-time and make six figures. The ceiling depends on how much time you put in and how systematically you approach it.
What Are the Risks?
Buying products that don't sell. If a product sits in Amazon's warehouse for 6+ months, storage fees eat into your margin and Amazon will eventually ask you to remove it.
Price tanking. Other sellers find the same clearance deal, everyone lists at once, and the price drops. Your ROI disappears.
Brand gating. You buy a product without checking whether the brand requires approval on Amazon. You can't list it.
Amazon's Buy Box. If Amazon is selling the same product directly, you'll struggle to win the Buy Box and your inventory stalls.
All of these risks are manageable with proper research before buying.
How Much Money Do You Need to Start?
You can realistically start with $200–$500. Buy a handful of products, send them to FBA, see how they sell. Reinvest the profits into more inventory.
Most OA sellers recommend starting small and learning the mechanics before scaling. A $200 mistake teaches more than a $200 book about OA.
Tools You Actually Need
At minimum:
- Amazon Seller account (Professional, $39.99/month)
- A way to scan products and check profit quickly
For the product checking part, FlipMeter is built exactly for this — paste a Walmart URL and see the profit breakdown instantly. Free trial available.