If you remember, I once shared a GoDaddy coupon code which allowed you to purchase a domain at only $1.99.
There’s another promotional code I’ve found which you can use to grab domains at only $5.
Almost every web host and domain registrars have special coupon codes and offers every month which can be availed to get discounts on their usual packages.
Here I have a GoDaddy coupon code which let’s you register a domain for only $1.99. Otherwise a domain costs $9.99.