AUCTION BONANZA

$50,000 (U.S.)

Average lot prices at Bonhams, up fivefold since it started special sales of contemporary African art eight years ago

$6 million

Total sales from Africa-only auctions in Nigeria since 2008

50%

Buyers at Bonhams’ Africa-only auctions that are from the continent

$84 million

Sotheby’s African and Oceanic sales in 2014, up from $4 million 20 years ago

$4.73 million

Record price for a modern African artist, for South African artist Irma Stern’s Arab Priest in 2011