What tools can you recommend for finding popular items to sell on eBay?

I would like to try my hand at dropshipping. I've heard a lot about this type of business, and I like the fact that it doesn't require a lot of investment, both financial and professional. Basically, anyone who knows how to sell can do it. And that's exactly what I know how to do. I worked as a seller in one online store for many years, and now I want to create my own and sell goods directly from suppliers from eBay. Can you please tell me what tools are available to help me choose the most appropriate items from this marketplace? I would like to choose the items that are actually selling so that I can get started with the most efficient selection possible.