There was (is?) a house for sale in Detroit, asking price... $1.00. Story here. (h/t Kedrosky)
It's highly unlikely that the original residents made $100k+, but you can see the bigger picture in TheLadders.com's Executive Job Market Trends. Check out the Regional Employment Interest. Detroit's score of 18 is horrible, and it means that everyone in the Detroit area is interested in jobs *outside* of Detroit while no one outside of Detroit is interested in working there. It's not a pretty situation.