If your looking for a case I recommend a cheap $15 plastic one if its just for basic use, like the MR-125B from Bytec.
My parents just gave me their old compaq thats like 10 years old and so I'm going to try and save the harddrive.
Everything else is busted just about. so I was thinking about turning it into an external(if I can). I've been looking for a simple portable harddrive case. But I'm not sure about the results that are turning up.