If you want to start a business with an aim to sell something, you have two options: one, you can sell physical products; two, you can sell digital products. If your business sells physical products, you need to spend money in product development and product procurement. You also need to work with a shipping company because you are required to ship the product to your buyer's address. When you are selling digital products, you can either develop yourself, or acquire from other sources. Once, you sell your products, you do not have to bother with shipping because you will be able to ship your product digitally and this does not require extra work or money.
Do you have a business? What are you selling, physical products or digital products?