In principle, anything can be sold, as long as you find a market willing to pay for it. The point is to understand what the needs and wants of that market are, and how to satisfy those needs and wants effectively.
For example, you can sell a stone if you can convince someone that the stone has special value. You can sell an idea if you can convince someone that that idea is valid and can bring benefits. You can sell a service if you can convince someone that that service is necessary or desirable.
Ultimately, selling is a matter of communication. It's about understanding what the customer wants and finding ways to communicate to the customer that the product or service you are selling can satisfy that need.
There are many factors that influence the possibility of selling something:
- The product or service itself: must be of good quality, satisfy a customer need or desire, and have a competitive price.
- The market: there must be a market of potential customers willing to pay for the product or service.
- Communication: must be effective in reaching the market and convincing potential customers to buy.
If you can consider all these factors, you have a good chance of selling anything.