The answer is simply, no.
The reason you should not buy an email distribution list to kick off your email marketing campaign is that these people are not your customers, nor are they likely to become your customers. Granted, people are signing up for these lists, but they are not in the market to hear from you specifically. These groups are more likely to opt-out of your list or even mark you as spam which can cause a lot of difficulty for you in the long run.
If you are looking to kick off your marketing campaign the right way, invest in strategic marketing ideas that establish your organization from others, build trust with your website visitors and convert website visitors into opt-in email subscribers!