Many people assume that they have to use their unique idea because they don't want to be seen as copying or being inspired by others. it is understandable, but how do you know if someone has interest in buying what you make?
How do you get feedback?
How do you measure buying intent?
Why do people buy?
Never mistake marketing with sales.
If people don't buy, how can you project or predict they will?
The business world in 2020 is a big buyers market. If there is a window labeled "Buyers behind the window", businesses start to line up in queues.
Marketing is not sales. Marketing is to put your things on the shelf. Sales is to stop people on the street.