850 Purchase advice, opinions on the offer!

Hi people I need an assessment of this ad: I drove it yesterday, everything works, everything nice, km are original (tüv documents etc) He is for my sister who lives in Sweden. She needs neither equipment nor super much performance but a value-stable and reliable car. But find it a bit expensive, but he doesn’t want to give it to under 5500. What do you think about it? https://m.mobile.de/…/270951627.html?ref=srp Best regards! Unfortunately I don’t have so much time around Always looking for something else, if it won’t be a gulf or something.