OK, so I'm keeping an eye out for the various Nikon bodies that surface on Craigslist, and in a lot of case, the poster is selling a camera that was just bought, and that is still "under warranty." Now, from what I understand, doesn't Nikon only cover the first buyer? Do you need to register for the warranty? If yes, then I'm guessing that if the first buyer hasn't registered yet, then the second buyer can do the registration and Nikon will be none the wiser? Also, what IS the registration process? Is it just a card that you fill in and put it in the mail? Do you do it online? Is there a deadline after which you can't register for the warranty? BTW, I'm in Canada. Not sure if things are different in the US or not. Thanks!