The Clintons’ purchase by interest groups is public knowledge.  For example, CNN reports that between February 2001 and May 2015  Bill and Hillary Clinton were paid $153 million in speaking fees for 729 speeches, an average price of $210,000.

As it became evident that Hillary Clinton would emerge as the likely Democratic presidential candidate, she was paid more. Deutsche Bank paid her $485,000 for one speech, and Goldman Sachs paid her $675,000 for three speeches.   Bank of American Morgan Stanley, UBS, and Fidelity Investments each paid $225,000.
-Paul Craig Roberts

Source: http://www.counterpunch.org/2016/04/13/president-killary-would-the-world-survive-hillary-clinton/