I don’t have set prices in general because there are too many variables at play that change from project to project (sometimes even within the same project). So the price is set at the start based on the requirements of the individual project and the agreed deliverables. If requirements change during the project then costs change accordingly. Either way the client is always kept informed and there will never be any unpleasant surprises from my side.
In the following illustration I have tried to demonstrate the relationship between DESIGN QUALITY, TIME REQUIREMENT and PRICE $.