Do you not believe a new sale is valid? Was it an active listing in your shop? If someone repurchased something they first bought 10 years ago, maybe they loved it and finally wore it out and needed to replace it. It's one of the reasons I love buying online - I can see my sales history, some places going back 20 years (which I have found very handy when reselling things like camera lenses, as I can see all the specs from when I purchased them originally, or finding a shop to reorder from if I loved their product, even if I maybe don't remember their name).
