I will phrase my question a little different-than-ordinary to make everything clear,
Currently : I have a domain which it's expire time is 3 months from now. the registrar is GoDaddy.
The problem : I want to extend the domain expiration date for like 10 years. and was wondering what can i do to minimize the cost. When extending, GoDaddy's cupons doesn't work.
Some things you should know : the domain isn't likely to be bought by someone else if the expiration date is over (its my familyname.com), I like godaddy, but not at every cost.