Image is everything. And in today´s world, a company without a website is a company without a face. That said, it's not enough that you just have a website. You must have a professional-looking site if you want to be taken seriously. If you already have a website but it is "home-made", having it properly redesigned will provide your business with the proper image which will inspire even greater confidence in your products or services.
About 80% of consumers use the internet to search for products and services they need before they make a purchase. Your website may be the first chance you have at making a good impression on a potential buyer. If your site looks like it was created by a barrel of colorblind monkeys, your chance at making a good first impression will be lost.
Your website is an important part of your business. Make sure you treat it as such.