E-onsoftware (Vue) used to overcharge non US citizens a lot also up to a 2 years ago. A large amount of European users boycotted E-On for thos practice, emailed them about this and after a month or so E-On changed the policy and now the amount paid is about the same everywhere.

As for taxes, I've noticed that as well, at times I pay taxes that don't even exsist or pay a higher percentage then it is in reality. 

Artwork and 3DToons items, create the perfect place for you toon and other figures!

http://www.renderosity.com/mod/bcs/index.php?vendor=23722

Due to the childish TOS changes, I'm not allowed to link to my other products outside of Rendo anymore :(

Food for thought.....
https://www.youtube.com/watch?v=pYZw0dfLmLk