Subscriber content preview. or Sign In
John G. Sperling, 93, founder of the University of Phoenix. His for-profit college model made him a fortune, ranking him among Forbes’ 400 richest Americans in 2006.
For $3.2 million on eBay, a copy of Action Comics No. 1, in which Superman first appeared. It sold for a mere 10¢ in 1938 and is deemed to be in nearly mint condition.