Generally speaking, a system refers to an open source system. If you don't have technology, the cost of this method will be higher. For example, wordpress is a typical open source system. It is not impossible for you to simply make a website, but it is too common. If you want to use it well, you need technology to make something with your own characteristics. If you want to find an e-commerce open source system, you can use wordpress+ plug-in. The place where you want to spend money is on the secondary development and storage server. It should be noted that the server you choose must be stable.
Personally, I prefer another way-to find tools to build e-commerce websites, because they are professional and the e-commerce functions will be perfect, and many functions have been standardized, which will save a lot of time. At the same time, this method can also avoid being cheated by outsourcing companies. Because the website building tools have been clearly marked, I want to mention the website building tools in SaaS mode here. This kind of website building tool is charged according to what functions you need, and you don't have to pay for functions you don't use. For example, the following SaaS model e-commerce website building tool-friendly ride: