Hello everybody i hope you have nice sunny day. Sorry for my English but this is my current level of writing . I have question regarding my mailing list. I have been collected mails from gambling related niche, i offered free e-book for mail. I don`t know how much is worth this mailing list, its 1500 + niche is poker. I never use this email list for monetize. All mail are fresh 2013/2014. Any advice ?