Here are the 3 main tools I use in my Amazon business that makes me $20k/mo profit on average. Most Amazon sellers drastically overcomplicate this stuff, I keep it simpled and that has served me well. Keepa tells supply, demand, and price action on graphs for every item. Its the backbone of product research. SellerAmp tells you if an item sells, if you can sell it, and breaks down the numbers. The storefront search feature is also helpful for finding more profitable items. Bqool is a repricing tool, it uses AI to get you more sales at higher prices. Hope this helps!