What is an acceptable mileage when buying used Audi ?

Hello, My wife and I are looking into joining the Audi family ! We are looking at used 2018-2020 A4 avant. In our price range (max 30k€, we are in Europe), we find either good specs with "high" mileage (150k-200k km), or low specs with low mileage (<100k km). I am more inclined to buy higher specs even if it means higher mileage but my wife thinks the contrary.

In your opinions, what is the correct angle to have when buying used Audi ? Is the A4 avant a reliable car even with high mileage ? Considering the maintenance has been done correctly of course.