Update: 36 with more than 200,000 sold (found so far)
177 with more than 50,000 sold (found so far)
http://selfpublishingsuccessstories.blogspot.com/
The "200,000+ self-published ebooks sold" club:
Barbara Freethy - over 2 million ebooks sold (April 2012)
Amanda Hocking - 1,500,000 ebooks sold (December 2011)
John Locke- more than 1,100,000 eBooks sold in five months
Gemma Halliday - over 1 million self-published ebooks sold (March 2012)
Michael Prescott - more than 800,000 self-published ebooks sold (Dec 2011)
J.A. Konrath - more than 800,000 ebooks sold (April 2012)
Bella Andre - more than 700,000 books sold (May 2012)
Darcie Chan - 641,000 ebooks sold (May 2012)
Chris Culver - over 550,000 (Dec 2011)
Heather Killough-Walden - over 500,000 books sold (Dec 2011)
Selena Kitt - "With half a million ebooks sold in 2011 alone"
Stephen Leather - close to 500,000 books sold (Nov 2011)
CJ Lyons - almost 500,000 ebooks sold (Dec 2011)
J.R. Rain - more than 400,000 books sold (Sept 2011)
Bob Mayer - 347 sold in Jan to over 400,000 total sold by year's end (Dec 2011)
Rick Murcer - over 400,000 ebooks in one year (May 2012)
Tracey Garvis-Graves - sold more than 360,000 copies of her first novel
Tina Folsom - over 300,000 books sold (October 2011)
J Carson Black - more than 300,000 books sold (November 2011)
Terri Reid - 300,000 sold (May 2012)
Marie Force - 300,000+ sold (June 2012)
Liliana Hart - "my total sales for one year have now exceed 300,000 books (June 2012)
T.R. Ragan - 293,202 books sold (May 2012)
B.V. Larson - over 250,000 books sold (Dec 2011)
Kerry Wilkinson - more than 250,000 books sold (Feb 2012)
M. R. Mathias - "I'm up to nearly 250k (in just two years) (June 2012)
H.P. Mallory - more than 200,000 ebooks sold (July 2011)
Scott Nicholson - Just guessing, I'd put my worldwide sales total between 200k-250k
David Dalglish - more than 200,000 (May 2012)
Antoinette Stockenberg - total sales stand at 216,686 (June 2012) - private email
Cheryl Bolen - 200,000 sold (June 2012)
Jennifer Ashley/Ashley Gardner - 200,000 sold mark in early June 2012 - private email
Nick Spalding - "I'm lucky enough to be in the 200,000 + total sales club now (June 2012)"
Catherine Bybee - nearly 200,000 of the novel Wife By Wednesda (Jan 2012)
Jamie McGuire - hundreds of thousands of copies sold of Beautiful Disaster
Hugh Howey- crossed the 200,000 sold mark in June 2012