The major problem with this is that there is no guarantee that the person you are using to purchase them for you won't use them. Legally, the person who purchases them is the one who can use them, and they cannot be redistributed either for profit or not for profit. Period. This constitutes piracy UNLESS you have express written consent from the owner of the media.
The next issue is that the person who purchases them has the ability download them up to 5 times (if I'm correct) from his store account because HE purchased them. Which means if you lose them, you have to contact the person who purchased them for you so you can get them again. Which, again, constitutes piracy.
I must ask - why is your visa not able to be used at the moment?
Priest of the Church of Joe Wood
In memory of Nanee. 9/1/1993 - 5/16/2009. Rest in Peace, little girl.