I purchased a Kobo Glo ebook reader frm ebay when it was sold at a very discounted price. The sale was over after a period. And I put it for auction on Ebay. The base price almost close to my purchase price. But then when it ended the winning bid fetched me close to 50% profit even after deducting the Ebay fees. Is this illegal? I understand there probably won't be any consequence for such a one off incident but how unethical do you think it is?