Unless they have been done recently by previous owner?

I assume all of us here on the forum are good oners who look after their machines Aren't we??

So why you assume the owner of this one has not look after his bike??

70k bike, probably I wouldnt buy it but doesnt mean it has not been look after and will not last another 70k.

Take with you somebody who knows more about mechanics and ideally who know the bike and give it a good check.