How often do you want to update your Web site?
I tried to buy something the other day and was told it was no longer available and “should have been taken off months ago.” It's important to keep your site current. For those areas of your site that change frequently, you may want the ability to input the updates yourself. With the right programming up front, this can be done with limited or no HTML experience. You almost have to think of your Web site as a living, breathing thing that needs constant attention.
Over the last 10 years the Web has changed dramatically. Have you changed with it? Look at your Web site and ask yourself if it is helping you generate business. If the answer is no, then you need to update it and make it an asset to your business rather than just a place for information.