There are people who stepped forward but no one was 'for real' according to Randi. He offers the price money in bonds, not real cash. They can even be completely worthless at the time they are paid out.
There is a good article about the experiences of 'Sean Connely' the webmaster of
PsiPog (now archived).
Here is the article containing a lot of information about how Randi pulls it up and makes sure that he doesn't loose his money.
Good day!
~Gonzo