Martin Worldwide sell innovative mailing lists to its clients. They have been going for over ten years in this industry and have built up a solid basis of knowledge. They have recently developed a system called ResponseCom which is unique in the fact that it blends US response and US Consumer databases meaning that the list has over 100 demographic and psychographic selects. They claim that their database contains the most powerful data due to identifying the prospects who have the most active, responsive and impulse buying responses. So if you are looking for lists brokers then this company could be a useful place to start.
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