One major company had us tweak their copy and sales doubled immediately. Having a professional writer do all your copy will probably be too expensive. Instead, write your copy yourself and have a professional writer fix it up. It may take no more than an hour of their time. Become an expert on something.
Experts are in constant demand.
Everyone wants to buy from an expert. Becoming known as an authority is probably easier than you realize. Spend time at your local library reading up on a subject your customers care about. Use search engines to find more information online. Jot down the things you learn and spin them into short articles.