I've tried Manta, but it seems like most people aren't signed up. I went through 100 listings, and only got 4 emails in my niche.
I also tried Lead Net Pro, but i'm a little afraid of falling into a spam trap (even though i'm following can-spam). It just seems like LNP gets a bunch of junk emails?
Anyone have any suggestions? This is the only missing piece to my puzzle.