Be careful what you offer at an advertised sale. It’s a crime to sell eagle feathers, some tortoise shells, and body parts of any endangered species even if they are just part of the decoration of another antique item. Firearms, swords, liquor and other things can’t be sold in some states without a license. An antiques dealer in Massachusetts was sentenced last week to almost three years in prison for selling sperm whale teeth and narwhal tusks. The whale parts were imported between 2001 and 2004, but it took awhile for the case to go to trial.