The price of your product influences perception of your product.
A pharmaceutical company recently did some testing on different groups, with the same drug.
When told that the drug cost $2.50 per dose, nearly all of the subjects reported pain relief.
When told that the drug cost $0.10 per dose, only half of the subjects reported pain relief.
Same drug. Different price. Different perception.
If you under-price your product don’t be surprised if people think your product is not effective.