Right now on Amazon you can get the iPad Griffin Extreme duty Military Survivor Case for just $49.99 (reg $79.99). This works for iPad 2, iPad 3 and iPad 4th generation. Plus you get free super saver shipping as well or free with amazon prime.
My dad has one of these on his iPad and it is practically indestructible. He is SO glad he bought it. In fact on Amazon there are over 800 reviews with a 4.5 star positive rating. This case can save you a lot of money if you are worried about it getting broken or having a cracked screen. Even at Walmart on black Friday it was regularly priced at $79.00. Here is a video showing the kind of abuse this case can take without destroying your iPad.