How is a site with fake content indexed?

Question

Search Engine Optimization

There is a site with the same pages, but with different prices for different regions. In the title, we indicate the desired regions of St. Petersburg and Moscow (that is, it does not change), and when the user enters, we determine it by GEOip and show him his regional prices. Who knows exactly how the search robot will index such a substitution?

Answer 1

For PS it will be a page with dynamically updated content. At the moment, search engines do not understand why the content on the page is changing.
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Answer 2

If we get lucky