Unfortunately, Stefan isn't available to provide 1-on-1 coaching or advice on which product you should sell.  Choosing a product to sell is a decision that you want to make based on a set criteria that can lead to the highest probability of success.  For that reason, Stefan recommends you go through a course such as the Amazing Selling Machine and follow the criteria they provide, which has been successful for most of their students.

Otherwise, a powerful tool that we recommend to help with research is called JungleScout.  JungleScout is what Stefan uses to find profitable products on Amazon a lot easier and faster.  Click here to learn more about JungleScout.