What’s the best way to learn the history and possible value of a large, 13′ x 26′ oriental rug? A friend is thinking about selling hers, and she wonders how to go about this without getting ripped off by a used car(pet) salesman. The rug was made sometime before 1890, probably.
Also, has anyone ever had a valuable rug cleaned? Could such a rug be ruined if cleaned improperly?