same as any other sale, however I think there are potential pitfalls (*however I’m a dour Scot) – you may want to stay friends after ….. not always the case when money involved/problems are found.
so I’d get a full survey (unless modern house) and get heating, leccy wiring etc etc checked and then I’d discreteley go round(preferably with a knowledgeable person – as they might be better than a full structural) and have the carpets up/in the loft/corners etc etc looking for problems/damp etc etc etc).
value is always contentious so you need to (both*) be comfortable with the price.
I’d also do all the std checks – neighbours, parking, subsidence/flooding, nearby ‘potential problems’ etc etc – to make sure you really want to live there.