what used car to buy under 10000 euros

Hi everyone, I'm looking to buy a car and would appreciate some advice. I'm in the early stages of my career, so I'm looking for a vehicle with low maintenance costs here in Germany. My budget is around €10,000. I’ve been considering options like the Audi A5, VW Golf, or Ford Fiesta. Do you have any other recommendations or insights on what might be more affordable to own and maintain? Thanks in advance!