It managed $9700 on Campbx and I don't think it was rolled back either. All we need for untold riches is chronically thin order books and zero desire to sell, ever.
It reached $1.3 million or so at the end of July 2011...it was one of Gox's many hackings/blunders. Mark blamed it on someone starting their DB before he was ready lol
edit: found the old link
https://bitcointalk.org/index.php?topic=33185and yes some of us had orders sell at that price, but it was rolled back