I was looking at buyiing a motherboard on ebay early last year. The motherboard was advertised as faulty, i got the serial number from the seller and explained to Asus, they said that i could do a warranty repair no problem even buying second hand from ebay as the item was still in its warranty periodgenuine question, do Asus not require copy of original invoice any longer? I know they did when I last bothered to register something.