Hi Rob,
As a company that provides an email marketing solution for other companies, I would not recommend that you purchase any email data. The reason I say this is if you decide to choose a company like ours for your email marketing you will not be allowed to use the purchased list within the system. Most of our competitors operate on the same basis so you may end up purchasing data that you will be unable to use.
I would also warn anyone that is considering sending emails to a purchased list from their own sender domain that they will run the risk of damaging their IP address beyond repair.
If you would like any further assistance or advice, please feel free to message me.
Regards,
Tim Wilson