It happens...
Several years ago I had another copy of this same card for sale and someone purchased it for $25-30 or so...
http://www.ebay.com/itm/1910-C113-Tu...gAAOSwBahVOsHe
As soon as they got the clearly identified tobacco card in the mail they sent me a nasty email saying I had been deceptive and they thought they were getting a real Isaac Newton autograph.
I asked them if they really thought they were getting a genuine ~$10,000 17th Century autograph of Sir Isaac Newton for $25 or so dollars and they got even more angry. Best to just refund and move on.