Purchase decision Omega 3.0 – 12V

Hello guys I’m just on it and I’m getting to buy an Omega A 3.0 – 12V with 177hp and 158000km.Want to know what to look for with this vehicle or if you can buy the actually blind.Have heard that the good old 3litres are actually indestructible.I would also like to know the maintenance expenses such as taxes and fuel consumption.The vehicle is built in 5/1989…