How many economists and successful businessmen have gone by. Especially those who have never sold anything to anyone in their lives.
Normally, if you think something can be very profitable to sell better than the competitors, so open your business, why hinder it? And if you just want that only you get a product or service cheaper, then remember the joke:

A man approaches a prostitute - how much will it cost?
The answer is 50 backs.
Surprisingly, what is so expensive?
She is interested – and how much would you do?