Why Unauthorized Sellers Move From Amazon to Walmart and eBay

2. Enforcement Can Push Sellers Toward Other Marketplaces

While diversification is a normal business strategy, enforcement actions can also motivate unauthorized sellers to move inventory elsewhere.

Consider an unauthorized seller offering a brand’s products on Amazon.

The brand identifies the seller and sends a cease-and-desist (C&D) letter demanding that unauthorized sales stop.

The seller now has several options. They can comply, dispute the demand, continue selling, or move their inventory to another marketplace.

Some sellers choose the last option.

They may believe that Walmart or eBay receives less attention from the brand’s enforcement team, allowing them to continue selling without immediately attracting scrutiny.

For example, a seller who receives repeated C&D letters regarding Amazon listings may remove those offers while continuing to sell the same products on Walmart Marketplace.

From the brand’s perspective, the Amazon enforcement effort appears successful. However, the unauthorized inventory remains available to consumers.

This is particularly common when brands concentrate their monitoring and enforcement efforts on Amazon while giving less attention to secondary marketplaces.

Importantly, selling genuine products without brand authorization is not automatically unlawful. Whether a brand can compel removal depends on applicable rights, contracts, product differences, and marketplace rules.

3. Marketplace Complaints Can Threaten Seller Account Health

Another reason unauthorized sellers may migrate between marketplaces is the risk of account suspension.

Amazon maintains seller account health systems that track policy compliance and certain enforcement actions.

When sellers receive valid intellectual property complaints or other policy violations, those complaints may negatively affect their account standing.

Repeated or serious violations can result in listing restrictions, loss of selling privileges, or account suspension.

For professional resellers, losing an established Amazon account can be financially devastating.

An account may have years of sales history, strong performance metrics, and established operational processes.

Rather than continuing to risk that account, some sellers may decide to stop offering a particular brand on Amazon and shift those products to Walmart or eBay.

This does not necessarily mean the seller has abandoned Amazon entirely. They may continue selling other brands while relocating products that create enforcement risks.

For brands, an unauthorized seller disappearing from Amazon may indicate marketplace migration rather than successful inventory elimination.

4. Different Marketplaces Offer Different Customers and Opportunities

Amazon, Walmart, and eBay have different customer demographics, shopping behaviors, competitive environments, and seller requirements.

These differences can make certain products more attractive on one marketplace than another.

Amazon generally offers enormous product selection and a highly competitive third-party marketplace. Sellers may face aggressive pricing competition, advertising costs, and fulfillment fees.

Walmart Marketplace offers access to Walmart’s online customer base, which may respond differently to certain product categories and price points.

eBay has a particularly established market for discounted merchandise, discontinued products, collectibles, refurbished goods, and open-box inventory.

An unauthorized seller holding older inventory may find that eBay is a better environment for selling it than Amazon.

Likewise, a reseller competing against numerous sellers on Amazon may discover fewer competing offers for the same product on Walmart.

Marketplace-specific fee structures, listing requirements, fulfillment options, and buyer expectations can also influence where inventory is sold.

Consequently, marketplace expansion should not always be interpreted as a response to enforcement. Sometimes it is simply a decision about where a product can generate the highest profit.

5. FBM Gives Sellers Greater Flexibility

Fulfillment by Merchant (FBM) is particularly useful for unauthorized sellers operating across multiple storefronts.

Under an FBM model, sellers maintain control over their inventory and ship orders themselves or through a third-party logistics provider.

This allows the same physical inventory to support listings across Amazon, Walmart, eBay, and other sales channels.

For example, a seller might have 1,000 units stored in a warehouse, with inventory management software updating available quantities across multiple marketplaces.

When an order arrives, the seller fulfills it from that shared inventory.

This creates several advantages.

First, sellers can shift their sales strategy between marketplaces without physically moving inventory.

Second, if an Amazon account becomes suspended, the seller may still be able to fulfill orders through Walmart or eBay.

Third, sellers can respond quickly to changes in marketplace pricing, competition, and demand.

By comparison, inventory stored in Amazon FBA may be subject to additional operational restrictions, removal procedures, or fees if the seller needs to recover it.

FBM therefore provides sellers with greater direct control over their inventory, particularly when marketplace enforcement becomes a concern.

6. Amazon’s Multi-Channel Fulfillment Makes Marketplace Expansion Easier

Historically, one of the biggest challenges of selling across multiple marketplaces was fulfillment.

A seller operating on Amazon, Walmart, and eBay needed to manage inventory, packaging, shipping, and delivery expectations across several different platforms.

Amazon’s Multi-Channel Fulfillment (MCF) service has made this process considerably easier.

MCF allows eligible sellers to use inventory stored in Amazon’s fulfillment network to fulfill orders placed outside Amazon, including orders from other supported sales channels.

This means a seller can potentially store products in one fulfillment network while offering them across multiple marketplaces.

Instead of independently picking, packing, and shipping every Walmart or eBay order, the seller can use Amazon’s fulfillment infrastructure.

This can reduce operational complexity, packaging labor, and shipping management costs, while potentially improving delivery speed.

It also lowers the logistical barriers to marketplace diversification.

A seller who previously focused exclusively on Amazon may find it easier to expand to other marketplaces without building a separate warehouse operation.

However, MCF is not an unrestricted substitute for FBM. Eligibility, channel requirements, fees, inventory availability, and account access still matter. Amazon’s fulfillment services also do not protect sellers from legitimate enforcement actions.

For brands, the broader implication is significant: A seller no longer needs completely separate fulfillment operations to distribute unauthorized inventory across multiple marketplaces.

As multi-channel fulfillment technology improves, brands should expect unauthorized inventory to become increasingly mobile across e-commerce platforms.

7. Why Amazon-Only Enforcement Is No Longer Enough

Many brands dedicate the majority of their enforcement resources to Amazon.

This is understandable. Amazon may represent the largest share of their online revenue, and unauthorized sellers can directly affect pricing, Buy Box performance, and authorized reseller relationships.

However, focusing exclusively on Amazon creates an enforcement blind spot.

An unauthorized seller who encounters resistance on Amazon may continue operating on Walmart or eBay, particularly if those marketplaces receive less scrutiny.

The result is an ongoing cycle in which brands remove sellers from one marketplace only to discover the same products appearing elsewhere.

There is also a pricing concern.

Unauthorized sellers advertising below MAP on Walmart or eBay can undermine authorized retail partners and potentially influence pricing across other sales channels.

A low advertised price on one marketplace can therefore create problems extending well beyond that marketplace.

Brands need to consider the broader e-commerce environment rather than treating each marketplace as an isolated enforcement problem.

8. How Brands Should Respond to Marketplace Migration

The most effective approach is to identify the underlying seller and inventory source rather than focusing exclusively on individual listings.

Brands should monitor unauthorized activity across Amazon, Walmart, eBay, and other relevant marketplaces.

When a seller disappears from one platform, brands should investigate whether that business continues operating elsewhere.

Seller business names, addresses, contact information, fulfillment details, and test-buy evidence can sometimes help connect accounts operating under different storefront names.

Brands should also evaluate whether inventory is being sourced from the same distributor, wholesaler, or liquidation channel.

If a seller can continuously replenish inventory, removing individual listings may produce only temporary results.

A stronger long-term strategy is to determine how the seller is acquiring the products and address unauthorized distribution at its source.

This may involve working with distributors, reviewing sell-through records, tracing product serial numbers, and identifying accounts responsible for supplying unauthorized resellers.

Marketplace enforcement remains important, but it should complement a broader supply-chain investigation rather than serve as the entire strategy.

Conclusion: Unauthorized Sellers Follow Opportunity

Unauthorized sellers move between Amazon, Walmart, and eBay for many reasons.

Some are diversifying their business. Others are pursuing better margins, reaching different customers, or responding to competitive pressures.

Others may be reacting to C&D letters, account health complaints, or the possibility of marketplace suspension.

With shared inventory systems, FBM operations, and services such as Amazon Multi-Channel Fulfillment, operating across multiple marketplaces has become easier.

For brands, the lesson is straightforward.

Unauthorized sellers should be viewed as businesses operating across multiple sales channels, not simply as individual marketplace accounts.

Removing an Amazon offer may solve an immediate problem, but it does not necessarily eliminate the seller’s inventory or prevent future unauthorized sales.