I am wondering how it works when you buy an Apple product that you did not originally ppurchase from the Apple Store. To my understanding if you buy an unopened Apple Product from a third party, the warranty starts from the day it was purchased by that person. To activate the warranty you only need to register the product in your name and the remaining warranty is valid. Is this correct? What happens if the product is already opened and registered under someone else? Also, as far as extended AppleCare registered to someone. What is involved in transferring this to the new buyer? Is it possible to transfer AppleCares to other computers if it's within the one year limit? I just starting thinking about this and how it works when people buy used iPods on eBay and such and then realized that I have no idea how the warranties work. Thanks for the help!