Ok, so I'm pretty ignorant on this and would appreciate your help
Almost 10 months ago a guy from USA purchased a physical iTunes gift card from Walmart and gifted me the code by email, I got the official apple email and everything, at that moment I tried to use the code but it said it was invalid cause I don't live in the USA. Then I totally forgot about it and just realize I still have the email with the code, my question is: when he ''gifted'' me the code by email does that make the code unable for him or he was still available to use it? I'm asking cause I would like to sell or trade for it and I don't know if it could have been used by him.