When do the seats wear out ect.?

Today I found an XC90 D5 Aut MJ2005 with 170000KM. According to information on the phone the Fzg checkbook is well maintained. On the pictures I noticed, the 1. the leather bag under the shift stick is strongly worn and 2. the middle armrest is extremely worn on the left side. This is a German Fzg. It was explained by the fact that the Fzg. was driven by a 140kg man. Since I have never owned a Volvo but have heard a lot about the good quality, I want to be smart – I’m going to do it.