We get to hear what the big .com guys turn down all the time. Berkens through WWMI.com, Schilling at DomainNameSales and Schwartz at Ricksblog.com.
In an interview at Allthings.tv, Dr. Chris Hartnett a long time domainer and someone with an incredible story, told Ammar that he turned down $250,000 for StockMarket.tv in 2007. He also turned down $85,000 for Guru.tv and $35,000 for Buddha.tv.
The whole interview is worth a read. http://www.allthings.tv/forum/showthread.php?p=110428#post110428
You can also read the interview he did in June of 2008 with DN Journal http://dnjournal.com/cover/2008/june.htm