I know the post is old but ther is very simple explanation to the problem. If the computer was damaged in transit there would be a visible sign on the packaging, even if only a scuff mark. What probably happened was that when the buyer opened the packaging and lifted the computer out of the box it may have been heavier than expected or got caught. Either way it is most likely the buyer dropped it after opening the box. Personally I would have gone with the post office as they were the sellers witness that the packaging was intact when delivered. Buyers are the most honest of people when it suits them to lie.