It is something that is rare, highly valued and sought after.
Spot on. In the US there is a magazine called Ebony that caters to the black market, sorry, African American market. I think ebony is actually high-PC and has the advantage (in the context of adult entertainment) to cover, with one word, African Americans and African Caribbeans, and of course African Africans.
From Ebony Magazine's website: "Ebony has been the general interest magazine of choice for intelligent, sophisticated Black-American readers since 1945. Its timely articles and smart photography explore education, history and entertainment, the arts, health, sports and social events."