Search car for xxx,xx Euro

Hello guys, I’m looking for a car for an acquaintance (student). As student the budget is quite tight. Therefore, the price and maintenance is one of the most important criteria. The following requirements should meet the car. – Halfway safe. Names at least. Driver airbag, ABS and a stable body. – Automatic (make the car more expensive is clear to me) – It should not fall apart directly after purchase. Rust and other defects., unless problematic with the TÜV and secure It’s not so important, but it wouldn’t be so dramatic. – It’s as cheap as possible. Consumption is not sooo important. Rather insurance, taxes and if there’s anything like repair costs. And, of course, purchase price. Everything else doesn’t matter. Which models should I look for and how much euro would you have to invest? If I read “how much euro is my car still worth” threads always deviate enormously from mobile.de and co. Thank you in advance. LG