What is the most expensive Domain Name Registration service on the market today?

No, I'm not crazy - I'm writing an article :-) There are a lot of registrars that charge around $10, or free with purchase. But who has the MOST EXPENSIVE domain registration on the net? And I'm not talking about pre-registered domains. Thanks

Public Comments

1. NSI (Network Solutions) used to be $35 a year. They are/were the company that registered all domain names no matter where they were purchased from. Registering through them directly used to be the most expensive...not sure if that is the case anymore.
2. Ditto NSI... They are as far as I know just about the *ultimate* (or one of them) "top tier" registrar. I had a domain there when I used Earthlink and when I moved away they said..."You'll regret it!" Not that I did...but I ended up paying far less!
3. I think it would depend on the domain suffix. For a .com or some thing like that it would be NSI(I think). But some ccTLD's are much more expensive.