Just buy it through Steam. It's $49.99 US now (I bought it for $37) and I think the exchange rate is like 1.00:0.90, you don't get charged taxes or anything either. Just use your credit card (or your parents), they might charge you like 2.5% or something for paying in US funds, plus the exchange rate of course.
I like Steam, you never have to worry about losing or scratching CDs. You just need a really decent high speed connection to download the games quickly enough. 90% of the legit games I have were bought and downloaded online. It's very convenient.