Buy Volvo V70 with 300,000km?

Moin, I’ve been looking for an older Volvo for a long time, now I’ve found a V70 gasoline engine with 144 hp from 1999. What should you pay special attention to when it comes to mileage and what are the child’s illnesses? Perhaps my driving behaviour: I’ll soon do my paxis semester and do about 20-30km a day for the first 6 months. After that I would like to keep it but then I’d rather travel 30km a week.