Ramey,
One of the best marketing methods on the Internet is through eZine Advertising. It sounds like you have the capital to really bust open a huge ezine marketing campaign. And as it seems that this method of classified advertising is working well for you offline why not give it a shot online?
Here is a large directory of ezines you can look into advertising in:
http://www.thebigezinedirectory.com/login/index.php?Redirect=%2Fpreferencesb%2Findex.php;sid=g1045507600141152142193
Goodluck,
Troy
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