Reseller guides
Plain-English explainers on fees, pricing, ads, and the business side of selling online. Each one is written from running a real store across eBay, Amazon, Walmart, TikTok Shop, and Shopify, and links to a calculator so you can check the math on your own items.
Marketplace fees
What each platform actually takes, line by line, with 2026 rates.
- Amazon FBA fees in 2026, explained line by lineEvery Amazon FBA fee in 2026: referral, fulfillment, the 3.5% surcharge, storage, inbound placement, low-inventory and returns fees, with a worked example.8 min
- eBay fees explained: what eBay really takes from a sale in 2026How eBay's 2026 final value fee works, why it's charged on shipping and sales tax, category rates, insertion fees, and promoted listings, with an example.4 min
- Walmart Marketplace fees in 2026: referral fees, WFS, and the new seller discountWalmart seller fees in 2026: referral fees by category, the June 2026 cuts, WFS fulfillment and storage fees, surcharges, and New Seller Savings.5 min
- Using Amazon Multi-Channel Fulfillment for Shopify ordersHow to ship Shopify orders from FBA inventory with Amazon Multi-Channel Fulfillment: setup steps, 2026 per-unit fees, branding, and when it's worth it.5 min
Pricing and profit
Setting prices that survive fees, returns, and landed cost.
- How to calculate your break-even price (and the mistake almost everyone makes)The break-even price formula for eBay, Amazon, Walmart and Shopify sellers, why you divide instead of adding a percentage, and pricing for a target margin.4 min
- Profit margin vs markup: what's a good margin for a reseller?Margin vs markup explained for resellers: formulas, a conversion table, gross vs net margin, and realistic margin targets for eBay, Amazon and Walmart.3 min
- How to calculate landed cost before you order from AlibabaWork out what an imported product really costs per unit: supplier price, freight, duties, customs, prep, and shipping to Amazon or Walmart, with an example.5 min
- How to price multi-packs and bundles so fees don't eat cheap itemsWhy flat fulfillment fees punish cheap items, and how 2-packs, 4-packs and bundles fix it on Amazon FBA, Walmart WFS and Shopify, with real examples.4 min
- How returns eat your profit (and how to price for them)What a return really costs an Amazon, Walmart or eBay seller, how to build your return rate into pricing, and practical ways to bring returns down.4 min
Advertising
Making sure ads pay for themselves instead of eating the margin.
- ROAS and ACoS explained: how to tell if your ads are making moneyWhat ROAS, ACoS and TACoS mean, how to find break-even ACoS from your margin, what a good ACoS is, and the ad mistakes that drain small sellers.4 min
- Setting up Walmart Sponsored Search ads (and fixing the "Something went wrong" error)How to launch Walmart Sponsored Products ads as a marketplace seller, and what to do when Ad Center says "Something went wrong" for your organization.5 min
Running the business
The operational stuff: channels, fulfillment, barcodes, LLCs, and tax.
- eBay vs Amazon vs Walmart: where should you sell?Selling on eBay, Amazon or Walmart in 2026 compared: fees, buyer traffic, fulfillment, approval, and which products fit which marketplace.4 min
- What I learned from my first Walmart Fulfillment Services (WFS) shipmentGetting onto Walmart with Express Setup, sending a first WFS inbound shipment, and what WFS fast delivery and fees really mean, from a seller's experience.4 min
- GTIN and UPC exemptions on Amazon and Walmart: what worked for meWhen you need a UPC, how to get a GTIN exemption on Amazon or Walmart, and why the brand "Generic" works on Amazon but gets rejected on Walmart.4 min
- Setting up an LLC for your reselling business: what I did in New YorkMoving a reselling business to an LLC: formation, New York's publication rule, sales tax registration, banking, and updating Amazon, Walmart, eBay and Shopify.5 min
- Sales tax for online sellers: marketplaces, Shopify, and your home stateWhen Amazon and eBay collect sales tax for you, when you collect it on Shopify, how economic nexus works, registering, and resale certificates.4 min