Create a repeatable process

If you notice that you gain much in some products, why not, repeat the process? Sell the same products and at that time sell on volume. Your products may not be perishable or rot, so there is no risk of losing a profit. Once you have your first few paying customers, create a repeatable process that can be scaled as you grow. Since you have proven that a certain method works, take some time to record your processes, documenting how you found your customers. Then focus your efforts on the most efficient channels and find ways to scale those channels. It may take time and hard for you, but you need personnel to work on those scales and processes. Your main task is to gather customers to profit more in a way that you could reach them through your plan of action.

You are absolutely right on that matter. It's very ideally to identify the most fast moving goods and concentrate on it. Even if it's only type of a product for that matter.

It's very possible as long as you have proven it through sales profit and repeat customers. Do the same what's good for the business as long as the customers are attracted to the products.

You are really right it is good for a good business man to take advantage of any opportunity he or she noticed so he can earn much from it before it becomes general

If there is a potential product people mostly like to buy then proceed to your idea of preparing the same products to display in your business center. That product gives strength to your business.

Doubling down what works for you is a great way to become successful. If you have a product that is selling high, you can create something similar to bring more sales.

If the process you made was so effective, to mean you gained much, then, why not repeat the same process? Only substitute with a new one if sense that the sales of that product are less.