Did Oprah give out Sprint Instincts on her show?

There seem to be a number of posts on the web purporting to be from people who went to a taping of Opera Winfrey show and were given Sprint Instinct phones with free 90 day plan. Here is a post from someone selling their Oprah Winfrey show Sprint Instinct phone on eBay. Here is another one selling it on a forum. Here is one from someone who is trying to figure out how to unlock it to use with AT&T (poor soul). There were some posts of Oprah show Instincts for sale on Craigslist too.