“Prices for African-American art have been steadily increasing as more and more lower-end black memorabilia have shown up in flea markets, antique shows and auctions for the past 15 years. While offensive items like vintage mammy and minstrel cookie jars, salt-and-pepper shakers and dolls may sell for up to $500 each, slave documents, books and other printed matter fetch four figures at auctions. At the top, art commands tens, if not hundreds, of thousands of dollars.”