Which Skip tracing Service do you use?

[Kenny Kamdoum]

Hello Fellow investors. I started a small direct mail marketing campaign of about 480 letters and i wanted another way to reach them. Skip Tracing came into mind and i wanted to get your professional opinion about which one i should use. I am on a fixed budget so i don't need something that is too expensive. Please feel free to drop the service that you all use as well as your experience using it (ie. how accurate is it, do they offer bulk pricing, etc...) 

Also if you have other ways to reach your people feel free to share it :)

Thank You.