ScadSense - 4:46 am on Apr 30, 2005 (gmt 0)
A few years ago someone asked me to look into the same thing. Search for "buy mortgage leads" and see what the going rate is. I think it was 20 dollars each or so for buying leads, categorized by state, etc (brokers only wanted to buy leads for their state or city).
Some of the people who sell leads will also buy them in bulk (for about 10 dollars at that time)... in order to then resell your leads using their network of buyers (brokers).