Many times people are looking for a coupon code to register or renew a domain. That is smart thinking and you should always do that. Before doing that for new registrations check Google and pay attention to the ads.
Go Daddy is usually an advertiser at the top of Google on the left hand side. Tonight they had an ad for $4.95 domain registrations. There is a limit of 3 domains. This is for anyone not just new customers.
You will notice NetworkSolutions.com running an ad too, but when I just went to Network Solutions they wanted $34.99 for a one year .com registration. When clicking the Google ad I went to a page that offered me $4.95.
So for new domainers make sure you go to Google to check for any deals that are better than any coupon code.