I'm in the process of selling my unibody MB through craigslist right now. I bought the AppleCare warranty at the time that I purchased my MB and the potential buyer wants the serial number from me to verify with Apple that the AppleCare is still in effect. Is there anything that I can do to show him that the warranty is still good? Or is it safe to hand out the serial number to him? Also, how easy is it to transfer the AppleCare over to him? I haven't met with the buyer yet, we've just been emailing back and forth for a while now.