I lent a $600 dollar sleeping bag to a friend/ex roomate for his trip to Africa. Upon his return he said it got stolen, but offered to replace it. Through email we agreed on a $300 sleeping bag. This was In April and after many emails and text messages of him promising to send it or drop it off, he has now informed me that he returned it and isnt obligated to give it to me and will consider later sending me money for it, maybe. Do I have any rights here?