Let's start with assessing value. If a product is valuable to its market then it deserves a price. Here's an example of one technique some have found very helpful in this situation:

"Forming a comprehensive pricing strategy through creating a market research study will help you get answers directly from your target audience."

Designing questions that will help you to understand what people are looking for and how much they are willing to pay for a certain product will help you to evaluate if you are selling a product for the best price.