My 2009 MacBook Pro, despite being fully functional after being dropped 5-10 times, finally bit the dust after being lost on a southwest airlines flight. I just bought a "new" late 2011 model to replace it and I think I may go with a hard shell case to keep the wear down to a minimum. I want to keep things economical and go with a case off eBay. Has anyone tried the hard shell case vendors there? Any recommendations?