"How much does a Web site cost?" It's the first question every client asks, and the hardest one to answer. Given the Gold Rush mentality now on the Web, development and construction prices vary wildly, and often not fairly. Of course, much depends on your objectives for the site itself, in terms of complexity, interactivity, even your audience. A competent developer (like say, rialto) will always work with you to make certain that your online marketing goals are realistic and deliverable.

That said, there is some general pricing information available on the web:

Net Marketing's Web Pricing Index