Steam or any other digital storefront decides to price a 80€ ($91) game the same as a $80 (69€)

1. Steam itself does not decides the prices.
2. Regional prices is meant to be uneven, as countries have different living standards and the conversion rate is not always the same.

Question:

• European prices include taxes already. Does the US price shown with or without taxes before checkout? I don’t know that actually. This could be another factor in different price shown.