The following are some really great articles that will hopefully convince you that BUYING AN EMAIL MARKETING LIST IS A REALLY BAD IDEA. Don’t take my word for it, these articles come right from the folks that provide email delivery services and email marketing services. The one thing you’ll notice is that they are all telling you the same thing. Don’t Buy Email Lists, it’s not worth the headache!!!
https://blog.aweber.com/email-deliverability/buying-email-lists-the-ugly-truth.htm
https://www.outboundengine.com/blog/6-reasons-why-email-list-buying-is-a-bad-investment/