US Consumer will still buy it if it is essential/critical. If it gets high enough they will travel out of US to buy it. Example people travel overseas for medical treatment/surgery/medication/products. Because even after including ticket price and hotel stay it is still cheaper overseas than in US. It might even open up new smuggling trade. Everyone bags are going to be checked more thoroughly in US.

Because of how cheap thing are outside US people may start traveling to SEA/china/Samerica and etc more for shopping, boosting their travel industries and economies. These countries can charge special (tax) on american tourist to collect more money, it will still be cheaper than buying in US.

You need to learn how to put on your shoes.