Copywriting: 100 word descriptions for categories on Internet directories

I have a bunch of website directories. These are websites that contain business listing and a brief description of these businesses. I have about 200 categories of businesses within them. For each category, I need a 100 word description written. The english needs to be simple and easy to understand. The description should be "informative" and not "promotional". For example: the category "Photography equipment" should have description like: This section lists websites and businesses that deal on photographic equipment such as cameras, lenses, tripods among other things. You can also find a number of useful resources that could be beneficial for the hobby photographer. Books and magazines on cameras, locations, best practices on photography are also listed here." If you are interested in this project, please contact immediately.