Average maintenance cost of a Tata Indigo Marina GLX BS-III

I'm planning to buy a used Tata Indigo Marina, GLX BS-III, 2005 model(petrol version). The car has already completed arnd 65,000 kms. Its tyres were replaced at 55,000 km and has got a new battery as well. The car has been maintained very well and is in excellent condition.

I have been told that the maintenance cost of used cars can be huge.

Provided its been maintained very well and is serviced regularly  my question is: 

Q. What kind of maintenance does this kind of car costs? 

Any other information that experienced users can guide me with is most welcome.

Thanks