Where to buy email lists?

Hey, I want to test some mass email sending and would like to know if it's something worth a try or is that just a scam so people will purchase those email databases?

I've found some websites selling emails but I felt that I must ask someone who knows, are those emails are real or are these just scams?

Here are some websites I found:
http://www.emaildatabase.biz/
https://www.emaildatapro.com/

The main reason I wanted to try it out is that sometimes I get affiliate…

Where to buy email lists?