iTunes cards can be easily purchased in the US. If you are not in the US then this can prove to be a challenge obtaining access to the apple store. You can buy physical cards and get them shipped to you, but that process is slow and ineffective.
Here at iTunesCardDelivery we offer iTunes gift certificates that are legitimate and purchased in the US. It will be like you just purchased your card from United States. You will then be able to enter your code into the iTunes store and hit redeem to get your iTunes money.