We've added regional pricing support. Currently you can see prices from 5 regions when viewing the game details page. The regions are Europe (Tier1), United States, Australia, United Kingdom and Russia.

Some time this week you will be able to set your region in the settings so you'll see the correct price when making/viewing offers etc. Until then you'll have to stick with $ a bit longer.

One other feature that will be available shortly is price history. It won't go back before today tho, but in the future, when more info gets collected you'll be able to use it to see how the price changed over time.