Finding email addresses for Buyer Leads

[Dee Seu]

Hi there, I'm new on this forum and also in RE investing. I'm working on my Buyers List and what I find time consuming is finding the contact details esp. emails for the leads I come across. I have tried google, facebook, white and yellowpages, 411.com, netronline.com and I think all the free sites I could find. I will very much appreciate it if anyone can come up with any more options I can search pls for emails and phone numbers. Please don't suggest any paid sites because I can't afford it. Thank you for your help.