Newspaper is going to reach about half the people looking for information about the real estate market. While only 5% of the people who buy a home will find it in the newspaper, 24% find it on the internet. So if I were advising you on where to invest your marketing dollars I'd say for every dollar you invest in print spend five online. Where online? That's another question...
All the Best
To answer your question (and you are a Realtor...I think you should know the answer), the 2007 CAR buyer survey reports that 12% of home buyers read a newspaper or magaine to look for porperties.