If you want to buy a car, you must think about the cost. So where will you get car in cheap rate. I will suggest you, if you want to buy car from Bangladesh, then you should buy from Chittagong. Because It is commercial city of Bangladesh and having the sea-port through which all cars are entering to Bangladesh. When this cars are shifted to Dhaka and bring to Showroom , the price must increase.
If you have any hesitation, then you can compare the price by yourself.