I have a list of 30,000 people who have never been mailed before who are interested in weight loss. All opt-in. How much would this list be worth? For example, if I were to mail them some sort of CPA weight loss offer or Clickbank product or weight loss supplements offer, how much should I expect to earn from this number? Yes, I understand there are lots of varirables, but what should I target? Any insight would be appreciated.