The Ultimate Crosslisting Weapon

Let me be real with you: I wasn’t planning on writing this.

I didn’t want to share this tool at first. Not because I was trying to keep it from anyone out of ego or greed, but because I knew how powerful it really is—and how much of an edge it gives to the people who know how to use it properly. In the wrong hands, a tool like this could be wasted. But for serious sellers? It’s a gamechanger. But if you know anything about me, I’m no gatekeeper.

If you’ve been following my blog for any amount of time, then you already know this is not the place for shortcuts, hype, or gimmicks. This is a place where real operators grinding in silence come to get next level insights, real tools, and actionable strategies that help them scale to the next level. This tool helped me scale sideways—and by that I mean multiplying opportunity, not risk.

This is what the OA dipshits do not understand. In their pea-sized brains, the only way to scale is to take on 10X more risk with razor thin margins. At the flip of a switch, their entire business can be turned off by Amazon. That’s why they all got destroyed. That is the exact opposite of how I’m trying to show you how to scale.

Our path is sustainable, and ruthless.

Instead of needing more storage space, more credit cards, or more capital to grow, I was able to massively increase exposure, improve cash flow, and simplify operations—all by working smarter across multiple platforms. This tool I’m about to show you gave me that leverage.

Let’s get into it.

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The Backstory: SEC 3 and the Wake-Up Call

Right before Q4, I got hit with a Section 3 on Amazon. If you’ve ever experienced one, you know what that means. All my funds were frozen and FBA shipment creation ability was cut off completely.

I couldn’t sleep for a week straight.

My cash flow situation became grim. I did not know when they would release the funds, and a huge portion of my capital was locked up.

I wasn’t overleveraged, but the fact that this could go on for an extended period with no end in sight made me realize how fragile this entire situation was. Depending on Amazon allowed me to scale from my bedroom, to garage, to storage units, to 4 storage units to my own warehouse in less than 2 years. But now things had to change. That same dependency became a curse. I had to become independent and seize back control over my business and my life.

At the time, I had just invested many thousands of dollars into shoes to flip, mostly planning to sell them via FBA. My business was about 90% Amazon, and this completely derailed my short-term plans.

One of my employees was listing shoes on InventoryLab, and all of a sudden got a strange error.

I couldn’t figure it out, but then realized my Amazon available balance was 0 while everything was on hold. Then, I checked my email and saw the dreaded Section 3 message. Without proper systems, my employees were not able to help me anymore.

I realized I had built a castle made out of sand.
I had become pathetic.

I lasted through sheer determination and the will to survive. All of my inventory I had on hand became a blessing in disguise. I was able to move it on Amazon via FBM and build huge immediate cash flow. I also was able to sell at higher prices and avoid the usual FBA race to the bottom. Check-in times became irrelevant. My inventory was available for sale immediately. This is when I realized scaling FBM was how I was going to reach the next level, not by shipping all my inventory on pallets to Amazon and letting them control my entire business.

But I didn’t have the right systems to do so. My employees did not know where to find the items. Items such as shoes looked identical in their boxes. I did not have packing workflows. I did not have a SKU system. I did not have ergonomic packing stations. I did not have an inventory management system or warehouse management system. I severely lacked infrastructure.

That’s why I began building.

It took me over a year of non-stop trial and error, endless failures, endless disappointment, to build the perfect system.

I had some listings on eBay—shoes with no boxes, items that weren’t compatible with Amazon—but I hadn’t built out a crosslisting system that worked for my needs. In my downtime, I decided to manually crosslist some of my inventory.

The process was painful. I had to manually download and rename images. Convert from webp to jpeg, HEIC to png. Copy and paste descriptions. Allocate inventory manually across platforms. Research pricing and sell-through rates. If I had two units of something, I had to decide how to split it—1 on Amazon, 1 on eBay—and then manually move units around depending on which platform sold first.

It was slow. It was stressful. It was a huge time sink. But I kept doing it because I knew I had to diversify. At the time, most resellers were acting like the good times would never end. Overleveraging their credit cards, buying inventory with zero systems in place, and depending entirely on FBA.

Maybe it was my gut instinct, but I knew something was off.

I knew people were too euphoric, too greedy, too stupid.

I just kept building in the shadows.

Then Amazon pulled the rug. Tons of overleveraged hands got wiped out.

Meanwhile, I had already been building foundational systems for months.

After getting a Section 3, the way I ran my business changed forever. I was determined to become unbreakable.

Not slave to Amazon, eBay, Walmart or any other platform.

Only master of my own destiny, maintaining control over the flow of goods and distributing them to the market by any means necessary.

I wasn’t trying to get rich overnight. I was trying to build something that would last.

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Q4: The Turning Point

During Q4, I kept crosslisting manually, despite the inefficiencies. I would list items on Amazon, eBay, and Walmart simultaneously. I’d allocate stock manually—maybe two units each if I had 6—and whenever something sold, I’d rebalance by moving units around between platforms.

This was far from perfect, but it revealed something important.

My cash flow skyrocketed.

eBay and Walmart paid faster than Amazon. I was turning over inventory much more quickly. Items I originally bought for Amazon were selling on other platforms—sometimes faster, sometimes for better margins.

Keeping items in stock became more of an issue than figuring out how to move my inventory.

Amazon owns the buy box? No worries I’m already sold out on Walmart.

Got regated on Amazon? No worries I’m pushing units on eBay for $10 more anyways.

That’s when I knew that crosslisting wasn’t optional—it needed to be the core of my strategy moving forward. But doing it manually was never going to scale. Even if I grinded hard and was on top of restocking, I would never be as fast as a machine. I needed a tool that would allow me to list once and sync across every platform. I needed a tool to automate the entire process.

Finding the perfect solution to this problem became my mission after Q4.

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The Trials: Other Crosslisters

I started testing out several tools. A few of the popular ones came up:

InkFrog sounded decent on paper but completely fell apart when it came to Amazon. They treat Amazon like it’s eBay—thinking you can just create new listings for any product, no structure, no understanding of gated brands, brand registry or compliance. They advertise that you can crosslist your eBay inventory on Amazon. If you know how Amazon works, you’ll instantly see how this isn’t possible. I wouldn’t recommend even trying it.

JoeLister was a bit better. It’s more focused on taking Amazon FBA listings and listing them on eBay for MFN fulfillment. If you do heavy FBA and just want to get your listings on eBay, it might be useful. But if you’re trying to build a full multi-platform strategy—across Amazon, Walmart, eBay, and Shopify—it just doesn’t do enough.

Support was decent, but the sync wasn’t reliable enough for what I needed. You might be able to make it work on a tight budget, but I needed something built for scale. If you’re limited on funds, this might be your best bet.

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The Tool That Changed Everything

That’s when I found the tool I use now.

It’s called SellerChamp (affiliate)

This software allows me to list a product once—and push it live to Amazon, eBay, Walmart, and Shopify. It clones listings from Amazon, pulls images, descriptions, and item specifics, and allows you to make adjustments across platforms if needed.

Here’s where it gets powerful: you can link listings even if the SKUs are different. So if your Walmart listing has a different SKU than your Amazon one, you can still sync them. This is especially important on Walmart, where SKU are locked, and changing it isn’t even worth the hassle.

With their listing-only plan, you get access to bulk listing tools, SKU creation, label printing, and batch management. That alone is worth it if you’re listing across 3-4 marketplaces. But if you go for the WMS plan, you get a full-fledged warehouse management system—including continuous inventory sync, pricing sync, order tracking, order routing, inventory locations, pick/pack workflows, and more.

They’re also rolling out support for TikTok Shop and other platforms in the coming future.

This tool wasn’t built by some software company with executives with no skin in the game. It was created by a reseller who actually understands the pain points of the multi-channel game. As a reseller, you will realize this immediately upon trying out the software. The support team and developers are incredibly hands-on. We had meetings on Zoom and they helped me tailor everything to my needs.

I still hop on meetings on a weekly basis to let them know additional changes I need to take my workflow to the next level. They’re always available to help you build your system exactly the way you need it. This is huge. You get a dedicated onboarding member who teaches you how to use the tool and sets it all up for you.

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What It Looks Like In My Workflow

• I upload buy lists created from SellerAmp and formatted through Google Sheets/Airtable automation (SellerAmp Guide Pt 2 Coming Soon)
• I list everything at once via CSV import
• I clone the listings to all platforms
• Resolve any errors (eBay title too long, missing fields, restricted product, etc)
• Inventory is automatically synced between channels
• Price changes made on Amazon push to Walmart and eBay instantly
• I print SKU labels and track COGS directly within the platform

I’ve completely eliminated InventoryLab and even dropped my $500/mo repricer (SellerSnap). This tool keeps everything centralized. When I make a change, it reflects everywhere.

I’m about to drop another guide where I show you my full software stack, which is an absolute game-changer. It might only be available on my Discord, we’ll see.

I can now list 3 units across all platforms instead of dividing my inventory. Before, if I had 3 units, I had to list 1 unit per platform. Now I can list 3 on Amazon, 3 on Walmart, 3 on eBay, and 3 on Shopify—and the system will auto-deduct inventory whenever something sells.

4X the opportunities, with no extra work.

More exposure. Faster sales. Better cash flow. No additional risk.

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Final Thoughts

Crosslisting changed the game for me.

It made my business more resilient, more scalable, and easier to operate without guesswork. The tool I’m using now is the best solution I’ve found after over a year of trial and error. If you’re building systems and want to simplify your entire catalog across multiple marketplaces, this is the solution you’ve been looking for.

If you found this valuable, I’d appreciate it if you used affiliate link here to sign up.

I don’t recommend tools lightly, and if you’ve been following my blog, you already know that. My goal has always been to help serious sellers build long-term, sustainable businesses. This tool is a big piece of that puzzle.

More content, workflows, and insights to take you to the next level coming soon.

Best regards,
Alex Hyun