The Trib is reporting that the Cubs have been sold (pending MLB approval) to the Ricketts family, who live in Wilmette and whose money comes from TD Ameritrade. $900 million was the magic number, and it includes not just Wrigley but 25% of Comcast SportsNet. Forbes estimated the team's value at $592 million in 2007, but $900 million is within the high range of estimates that have been kicked around for the past year or two. According to econ prof Andrew Zimablist, that's the ego premium. Earlier this month, Mark Cuban said anything near $1 billion was too high for him.