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>Any idea how much this data is worth?
I do not know what the exact legal precedents are geographically, or what state or country is involved, but it could turn out to be a very costly proposition for you to distrubute the addresses if you have not received specific permission to sell or further distribute people's email addresses.
Of course, we're not legal experts here, but some states have very stringent laws related to what's called "permission marketing," as well as those by numerous web hosts who will cancel subscriber accounts of those who send out unsolicited email.
We cannot advise you on the worth, but we can certainly advise you to check with your local authorities regarding the regulations concerning sending unlsolicited email to those who have not given specific permission to do so.
The more specific, and detailed a record is, the more it costs. For good, clean data, you can pay as much as £1/record. If you are just selling an e-mail address, 10p/name is probably fair if that's all the information you are selling. Have you checked the addresses to ensure they actually work?
Gernerally the best are of email addresses that bought something within the last 30 days. Usually ten thousand names are the minimum to be handled by a list broker.
A good list of current buyer can be rented five or six times a month. Ten to fifty dollars a thousand (before broker's fees) for a single use is possible for a good quality list.
Smaller lists that are targeted to decision makers can to be rented too. So a list of 1500 CIO's of larger companies might be rentable also. Here the source might be a newsletter. More often than not ads would be sold in the newsletter but occassionally the list might be rented to an advertiser.
In Direct Mail this is called working the back-end and some direct mail campaigns make as much profit on the mailing list as they do on the sales. Again only current buyer's addresses are rented.
He just happended to check the opt in case when doing an adress change. Since then, it is a flood of very low level SPAM he receives on a corporate e-mail. Very embarassing.
We suspect one of theyre partners to leak stuff to nameless and greased sphincters. Still have to gather enought tracks.
To answer, opt-in list are decreasing in value, so do results from them.
List renters are required to post a bond on very valuable lists. The renter can be held liable for any misuse.
List that originate as current buyers of a site through a broker are generally better guarded. The represent a portion of the customer list of a company.