During my usual browsing for deals I got notice that the domain registrar 1and1.com is offering new customers that register a .com domain free service for a year. Most registrars usually have a promotion such as enabling new customers to register a domain for $1. The renewal fees are usually pretty standard at about $10 from my experience. That is why a lot of people jump providers to get more savings when their domain is about to expire.
I am not sure how long this offer is going to last. But, if you were someone who just wants to be super frugal and was holding back in registering your own domain then here is a risk free offer for you to take advantage of.