A good friend gave advice on pricing packages for photographers which can also be applied to freelance web designers.
When pricing packages, think of your expenses, cost of resources, production, time, and the value of your skills. Then add a margin, which is usually a percentage of your basic needs: food, clothing, and shelter. Depending on the industry, the range varies. It scales with the skill value.
Remember a part of it should go back to your business. Reinvesting, upgrading, expanding, etc.
Compute all the disbursements and if it’s more than your package price, then you’re losing money. Consider what’s your effect on the industry as well. Do not drag the industry down.