I am from Europe and I bought something from Origin. What I've seen is that in the USA store the games are the same prices, but in dollars (which makes them cheaper, due o the exchange rate). If I make my purchase from the USA store (giving my account and credit card info to someone in the US) at a better price, can I download and play the game from my computer in Europe?
I think I can help you, I'm european too and I recently look through that
After all that I do think that origin american keys would work if accessed through Origin client with european IP adress.