Even the good products alone don't sell themselves. In a highly competitive world even a marginal USP will help set a product apart and develop a stable customer base.
The price could well be the USP but that doesn't last long in face of competition. Pricing quite often tends towards the irrational in that high prices mean quality.
The right product at the right price needs to be available where the customers are. Explore geographical, physical, mental or virtual locations where your product will find its customers.
The availability of a product needs to be informed to the targeted customers through the most effective channels. The higher the degree of involvement with a customer the greater the success.