If you don't have a website, you're losing business to competitors who do!

The cost of maintaining a Web site is probably the most cost effective advertising you'll ever do.
Answer:     DEFINITELY, YES!
While we're not suggesting that you should put all your efforts into selling on the internet, if your product lends itself to easy online sales, you should certainly consider it. The point is that, at the very least, you should  have a presence on the web so that people can quickly and easily find out more about your business and the products or services you have to offer them, and while Facebook is a great tool, it is not the only tool you should be using to get your business.  A website will show your potential customers that you are a serious about your business.
You might believe that yours is a small operation, but when it comes to benefiting from a website, size does not matter. Whether you're a one-man show or a corporate giant; if you don't have a website, you're losing business to other companies that do.
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. Since many people now search for information online before making a purchase at a brick-and-mortar store, your site may be the first and only chance to make a good impression on a potential customer.
Perhaps you have a "service" oriented practice such as accounting, law, or medicine that's already doing well and you're wondering why you should burden yourself with the added expense of a Web site. Even if your best business comes by word-of-mouth, your potential customers may want to check you out. A well-designed, professional web site can give you added visibility and credibility.
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The Internet is one of the first places a person will go to get information.

The Internet is "THE" place your customers look to for information.

It's the 21st century version of the Yellow Pages!