Price of a used car depends on various factors like condition, kilometers done etc. However, if the car is in good condition, reasonable price for this car would be around Rs. 4.0 lakh.
You can also find more used MahindraBolero cars here- http://www.cardekho.com/used-mahindra-bolero+cars
If mileage is a concern then you should look forward to the Audi Q5 2.0 TDi diesel. It should offer you 9-10 KMPL in cities, it would depend majorly on your style of driving, the condition of the car and also on the terrain that you drive it on. Maintenance costs would fall between the range of 20-25 K which includes one service per year and also does not include any part change. Click here to check out the options available across India for Audi Q5, make sure that you select your city before you take a look at the options.