You can forget about how much work, time, and energy you devoted to producing a product or service. This fact has nothing to do with its worth. It also doesn’t matter how skilled you are in closing the sale.
The only significant factor is how much value (or want) that the customer places on what you are selling. The consumer is the one who will pay for and use your product or service. You must please them first. Everything else is secondary.
Daniel Jacobs, 2017