This is something I have no clue about. Here's how I would approach it though:
Look at your competitors prices, and place your own game somewhere near that range. Maybe even undercut those games if you're like that (business tactics lol).
Or just make the game really cheap or free. Go for the high volume, low margin strategy. I've no idea which way I'm going to go because this is my first game but when I figure it out I will let the world know.
