The 'winner' isn't the product; it's the infrastructure behind it. I see so many people burning $50/day on ads for a store that has a 0.5% conversion rate. You're donating money to Mark Zuckerberg at that point.
I shifted my focus from 'finding products' to 'leveraging expert systems.' The difference between a store that struggles and one that scales is usually just a few technical tweaks in the backend that most of us miss.
I've got a checklist of what an e-com backend should look like before you spend $1 on ads. Happy to send it over to anyone trying to stop the bleed.