Given that he has an ebay rating of 102 every transaction than can be viewed is for the Deleted Magic disk. Thats £3.20 x 100. That's a profit of £320. Thats $596. Not bad for a student or somebody who needs a little spare cash.
Besides, this is a thing of principal. Nobody should be making any money on these discs. Plain and simple. But I guess this is a certain amount of inescapable inevitability.