Gem prices throughout the world
I think you have to account for different prices/earnings ratios in the different countries, but that’s just an educated guess.
I’ve heard that Europe has some crazy taxes (i.e. VAT). Digital services purchases over the internet is subject to VAT. Perhaps that’s involved outside of any exchange rates?
In GW2, Trading Post plays you!
In the UK I believe Anet is required to pay a VAT rate of 20% (which accounts for $10 in difference) in addition to any other fees or taxes applicable in the region. The same is likely true in Germany. In addition, currency conversions aren’t free.