Symptom: Clients don't perceive the quality of our products, and hence don't think they're worth the price.
Clients may still be dissatisfied with your price if they don't perceive that the quality of your product warrants its cost. The perception of quality is a key part of the equation. It may be that clients don't perceive a quality difference.
Or clients may be comparing "apples to oranges." They may be comparing a subset of the costs of doing the project themselves to the total cost that you bid for a professionally made product from your organization.
In either case, the organization's (internal) Sales (client liaison) function is not succeeding at creating the perception of value.
Another (more generic) way to state the problem is as follows:
