Before choosing a domain name with the word “Realtor” in it, be sure check the National Association of Realtors rules regarding usage! You don’t want to spend money and time creating and promoting a website, only to have to change your domain name because of a trademark violation.
There are many domain name registrars out there. I use GoDaddy.com. You’ve probably heard of them because of their Super Bowl and other commercials with GoDaddy Girls Dana Patrick, Jillian Michaels and others. They are very reasonably priced, and have an easy-to-use control panel for managing your domains.
Another well-known domain name registrar is NameCheap.com. Either of these sites will provide everything you need to purchase and manage your domain names.