ROADSHOW's "Unique Antiques" showcases some of the most outlandish, kitschy and downright morbidly fascinating antiques and collectibles of the series' last decade. Warning: These objects have been appraised by trained professionals; don't try this at home! Highlights include a Weller pottery humidor in the shape of a skull; a chair once belonging to Chang Boker, the owner's great-grandfather and half of the 19th-century's world famous conjoined twins, Chang and Eng; and a collection of tin cans salvaged from a 19th-century dump and valued at $10,000 to $14,000.