On the other Ebay hand

Swann Galleries is a highly reputable art dealer and auction house and they have 332 lots for sale on Ebay with some real steals (such as a Sam Gilliam starting at $500 Update: It closed at $2600 - still a great deal!).

There are quite a few works by African American artists of the caliber of Romare Bearden, Jacob Lawrence, Lois Maillou Jones, Renee Stout and many, many others. By the way, Swann has recently established a new department in their auction house called African-American Fine Art.

Also terrific photography by European American photographers Sally Mann, Imogen Cunningham, Walker Evans, Weston, Atget and many others.

See the lots here.