Quote Originally Posted by Tint View Post
this means basically that the person who buys my item decides how much money i will get at the end. and in one case none taxes are payed at all and in the other case the taxes are payed twice.
This is incorrect.

The amount of money you get is fixed. Taxes based on the purchaser's market only affect the buyer. Seller's taxes are always paid, and have no relation to the location of the transaction.