It appears that the prices shown if you select Germany/France to get European prices are often wrong. It seems that the prices are arrived at by just converting the currency of the US price from $ to €. Unfortunately, not only do many outfits set Euro prices that correspond to an exchange rate of $1 = €1, but in some cases the price in the European shop is just different (usually higher).
A notable example is Deus Ex: HR, which was on sale for $7.95 in the US storefronts, but went for €12.95 in the European storefronts, but this site showed the US price in $ converted to €.