Look for a healthy distribution of revenue
JungleScout is the market leader for product research. It can help you uncover vital data about your competition before you start selling.
Assess potential demand
Assess competition with review count
JungleScout will also display the number of reviews that a seller has for the product. You will have trouble competing with a product whose reviews surpass 100, as it will take a long time to build up the reviews to compete.