reliable used cars suggestions?

I’m trying to buy a cash car off Facebook Marketplace or Offerup but I need some help deciding which type of car I should get. My budget is around 6-7k.

i was thinking about getting a Subaru cross trek but after investigating further i found that many people had to rebuild their engine or just had lots of problems.

My current car is a 2007 vw passat which also ended up having a transmission problem so im really just looking for something that’ll just need general maintenance.

i also am a commuter college student that drives 20 miles to school and back, 5 times a week so i need something durable

(not interested in car payment, im a college student)