DELTA blues god Robert Johnson's Gibson guitar is on the block for a whopping $6 million. Johnson, who died in 1938 at age 27, is the subject of a famous myth in which he is said to have gone to the crossroads of U.S. Highways 61 and 41 in Clarksdale, Miss., and sold his soul to the devil to play his guitar better. (Johnson wasn't the only musical icon to die at 27 - others in the tragic club include Jimi Hendrix, Jim Morrison, Janis Joplin and Kurt Cobain). Ultra-rich blues fans can go online to rjguitar.com for details.