Before I ran Amazon ads for other brands, I launched my own private label product. It was a magnetic phone charger, and it sold more than $100,000. When I added up the fees, the ads and the cost of goods, it had roughly broken even. That result hurt at the time, and it taught me a lesson every beginner should hear before buying stock. If I launched that product today, I would change three things. 1) I would work out the profit per unit before ordering any stock. Amazon's fees, the landed cost and a realistic ad cost per sale all go into one calculation. A thin margin on paper almost always gets thinner once you launch. 2) I would choose a product where I could stand out on something specific. Mine looked like every other charger on the page, so price comparison was always the case and ads had to work extra hard to get the click. 3) I would start smaller. Online arbitrage means buying products at a discount from other stores and reselling them on Amazon. It made me more money than my first private label project, and it taught me how Amazon works with much less risk. Private label is still a good model, but sales and profit are two different numbers, and the gurus usually only talk about sales, with no mention of what profit they made after all the fees and costs. I'm restarting this feed with posts like this one, built from real accounts and real numbers. I want you to skip the expensive lessons I paid for. So tell me where you are right now. Finish this sentence in the comments: "The thing I'm most worried about before my first sale is ____________"