It can be tempting, but you’ve got to resist that temptation. The only way to get an email subscriber list that will be beneficial to your company is to grow it organically. First of all, many email service providers won’t even allow you to use purchased lists. And secondly, the email addresses found on lists like those are not high-quality leads, to say the least. They will not contain people truly interested in your products or services, since these people didn’t opt-in to your specific email list, so they’ll also be much more likely to mark your emails as spam.