As long as you know what you want, and don't mind waiting for the post, it is a great alternative. The cheapest is 5-15 dollars for a mac package, depending on the weight. And that takes 2-4 weeks from ordering till you get it. But you can always use more speedy couriers, that cost more, but you get it in a few days
We don't have any stores in Norway either. But we have 2 or 3 counters that sell refill products. And 2-3 counters that just sell the "regular stock", and we finally got an online store that sells mac a year ago. (and no counters that take back2mac) Cosmetic life isn't as easy as it is in the US