Hi Joe
I change Vac lines and breather hoses as a service item on our cars 2 X5's and Wife's Subaru Outback all are serviced annually to manufacturers standards by myself (son says I have OCD 🤣) any rubber hoses showing signs of degrading are changed as a matter of course so I wouldn't worry as long as its changed. Oil and rubber are not best friends and as your potential purchase is around 7 years old it is quite likely near end of service.
Subaru is a 2004 3.0 has 164k on the clock and runs like a Swiss watch BMW E53 4.6is 137k like the Subaru runs really well BMW E70 3.0d 138k as the other two.
Dave