Buy or let Omega A 2.6i?

Hello together, I wanted to lay down an Omega A 2.6i. Now I have no idea of the 6 cylinder engine of the Omega ́s. What must be considered, is the machine easy to care for? I have seen on the internet at various online providers Omega ́s who have run around the 180000 to 220000 km, buy fingers away or without hesitation? Who can give me a few tips! In advance already thanks for the help. Greeting Max-079