Hello.
Just recently got around some Riot Graves codes and decided to selling them with a cheap price.
Codes works on both NA / EU or anywhere you want, even in Turkish & Brazil servers too.
You just need to contact with Riot Support to proof that you are the owner of the code (which is i will send you the picture of a single code) so after that you will be able to use skin and champion in your account.
Skype is ozan.erol4 and price is 20$ via paypal.
Thanks for your interest.