Starting an Amazon FBA business feels a lot like being handed the keys to a store that's already stocked, staffed, and open for customers. The appeal is obvious — no storefront lease, no in-person sales pitch, just products moving off virtual shelves while Amazon handles the logistics. But that simplicity is deceptive. Behind the scenes, new sellers make predictable missteps that quietly drain their profits before they even realize what's happening. Understanding these mistakes early is often the difference between a business that scales and one that stalls out in its first year. Treating Product Research Like Guesswork Too many new sellers pick a product because it "seems popular" rather than because the data supports it. They skip competitor analysis, ignore seasonal demand swings, and underestimate how saturated a category already is. The result is inventory that sits in a warehouse racking up storage fees instead of generating revenue. Solid product research means...