Be wary of some resellers...they might have a great registration price but they have 'fees' attached to many services that many others give/offer for free.
If you pay much less than 8.50 a name, unless there is a legitimate promotion happening, there will likely be some 'strings' attached by the reseller.
If you spend extra, you can get into the godaddy domain club which will lower your prices. Some that I use that offer good service at reasonable prices are epik, namesilo and dynadot. I also used uniregistry in the past but have not attempted any new registrations since the godaddy buyout.