LOL! Why would you even sell it? It was a gift, even if you hate ur ex just leave this mug for you... I never sell presents, unless I had a gift worth shi*loads of money, I would never trade it even if I don't need it. Last time I received a watch which I didn't like for birthday from my friend from DSRLeasing I just put it in a drawer, even if I could have sold it for $500 USD at least, but who cares - it's a gift.