Just like your office has more than one phone number your web site can have more than one domain name. 123cars.com can be forwarded to your existing web site. Do you have a radio, TV or billboard ad campaign in the works? Right after your phone number and make sure they have a quick and easy way to find you when they can get to a computer. Add a one syllable word that represents your business and the every-present 'dot com' and you have another customer via your web site.