I've seen a mac listed as 'new and still sealed' on eBay. The seller isn't a shop, but he's sold one or two other mac items in the last few months, a couple pre-owned and a couple still sealed. How does the 1 year warranty work when you don't buy direct from a shop which gives a proper receipt? I've never done it before. I asked the seller about it and he says it starts form the day you register it with Apple, but surely that would lead to people not bothering to register fo r6 months to effectively get 18 months instead of 12, etc.