Buying lists? Services I need for my marketing Campaigns

[Luis Lozada]

Hello all, So I'm getting ready to start a marketing campaign and I was wondering if I should use a service like agentpro247 or listsource, or try my luck at going to the county and getting the run around time after time for my lists of motivated sellers. This is my first marketing campaign so I'd like the best chance at reaching a motivated seller. Second part of my question is what other services will I need besides a direct mail, and a telephony service for call backs. I've identified some service providers for both but will I need any other services to help ensure efficient communication with my potential sellers? Thank you in advance.