Our cost for a 3rd gen iPad with Retina Display in the 32GB configuration is about $638, with software and accessories. But the value is on the data. That price cannot be measured. So please remember to backup that data. iPads are, unfortunately, not indestructible. But an ounce of prevention, in the form of a regular backup regimen, can mean the difference between "I have all my notes, so this test will be easy!" and "Gee, I wish I could remember the stuff I was taught back in September..."
Here's a set of guidelines for managing your data in a mobile & connected world.