Prius II Help with the purchase

Moin together, I plan to buy a Prius II, I don’t know about it so far. So far I drive a 1998 Omega automatic with almost 130,000 km, which a friend of mine would take away. I am a pensioner and our “requirement profile” to the car has changed greatly: I am mainly on the road in urban traffic. The Omega takes itself, especially when it is cold and only short distances lie on, loosely 15 liters. I don’t need that, I can use the fuel charcoal otherwise. Now I would like to know if you can get a proper Prius II for about 4,000,– to 5,000,– € and what I have to pay special attention to during the visit and test drive. Are there special rust spots on these cars, how long-term are the hybrid batteries etc. or are there known weak points? Thank you already in advance!