I'm thinking of trying to sell my water damaged MacBook Air (probably on ebay, though I know it's rife with scammers...). This is a pretty basic question, but do I need to be worried about people getting personal information that was saved on that computer? Background: I spilled water on it, it turned itself off, I turned it on a week later and it seemed to be working fine except that it wouldn't charge. It's now completely dead and won't turn on. The folks at the PC place I took it to said they couldn't fix it, but I'm not sure if they meant they couldn't fix it/recover my files or that no one could (they were speaking Japanese...). Thoughts?