I think Vihtavuori powder has stayed relatively affordable is because the US Dollar has been extremely strong.Remember when Vihtavuori Powder was so pricey that it felt like you were buying Powdered Unicorn Horn. Now it feels like a bargain purchase as $45-$50 as compared to majority of other powders trending up toward $65.
Maybe now is the time to upgrade your powder selection on the cheap...
US travelers to other counties are finding they can buy a lot overseas. But it's just the opposite for foreign travelers coming to the US as their money doesn't buy a whole lot here and tourism to the US is way down because of that.