What you’re getting at here is an economic concept called [purchasing power parity](https://en.wikipedia.org/wiki/Purchasing_power_parity).
Different goods have different prices in different places, even accounting for currency conversion. This can be because of differences in local supply (goods are cheaper near where they’re produced, generally speaking), differences in laws creating different transaction costs (e.g. if imports of a certain good are banned or heavily taxed), labor costs (almost every good needs some local labor, if just to run the store where you’re buying it), and so on.
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