How Profitable is your Business?

That depend.   How much are you willing to invest on your product. This is the whole reason you're in business, because you have something to sell, whether is a service as well. The best way is to focus on profitable product you can buy again and again with no problem and then move from there is the product you want to list on amazon, eBay, esty and whatever eCommerce sight that you want to sell on
Selling on Amazon took a long time to make money, but that came quickly when I had the product ready for every order
Every Second counts so get to work