If i use a new key i have to change my character name ?

[rgqric1]

If i use a new key i have to change my character name ?
who can sell me one key for 1 buck ?

[Woodhouse]

If i use a new key i have to change my character name ?
who can sell me one for 1 buck ?

No. You don't have to change your name but if you join a server that you were banned from (before the global ban) the admin could possibly recognize your old name and ban you :P

[misterzombro]

Nope. And for keys look around for a trusted seller.

[darkangel1]

As others have said no, and look at the marketplace here, It's a good place to start.