Unless its a major holiday, where it would be considered a "gift", the ring should be given back. Look, the ring is based on a promise, one of marriage. Once that promise is broken, the ring should be given back, as it no longer symbolizes what it was meant to do. Why should the woman be allowed to keep and sell something she didn't pay for, and should have no right to? It just doesn't make sense to me, honestly. I dont think circumstances has anything to do with it- unless the man was a total bastard and cheated on the girl. But even at that point, why would she want the ring? I cant think of one, because the memory would be too harsh. May she want to sell it, because of the "entitlemen" she feels because she was screwed over? Sure. Especially in those cirumstances. Even so, the promise wasn't fulfilled, and I dont see the entitlement to the ring there. You either do or you don't, I dont see the grey here. I would say the male gets the ring back.