It depends on where you get it and if you install it yourself. A dealership will charge you just over $300 to install a new battery for you. You can buy one and install it yourself for about half that....Unless its a Lithium battery for and electric car. Those start at $16,000 and got up dramatically for vehicles with higher energy demands.
@TexChik Makes sense. I changed the battery myself. I just needed the battery. The cheapest one they had. And it just seemed too expensive for a generic one.