All I would add is whatever confidence you place on ‘full service history’, personally, I would treat it as desirable (for the mind!), but once you have the vehicle, treat it as if it never existed, and renew every filter with quality ones, so you have a sound basing point from which you can confidently move forward with your own servicing plan.
For what it’s worth:-with our now high mileage ( but not annually high now), I change the oil and filter every year - using Longlife 3, and the air and pollen filters every two years.
Kind regards,
Gareth.