Several iconic works by both Andy Warhol and Jean-Michel Basquiat will be at auction this May in New York, the Wall Street Journal reports, including a 1981 painting by Basquiat at Christie’s which has never been resold, and has never before been exhibited publicly.  It is valued at $20 million.  Also on sale is Warhol’s Six Self-Portraits series from 1986, which is valued at $25 million, and is selling at Sotheby’s. (more…)