Back in March, Mark Brownlow posted some good info on his Email Marketing Reports site about list rentals, list purchasing, and co-registration.
Is list purchasing a good idea? "With very, very few exceptions, purchasing a bulk list like this is a shortcut to email marketing hell." "No self-respecting list owner is ever going to sell copies of their address list. Not if they want to preserve its value."
Great advice! Click here to read the entire article.
Update: I had missed this new bit of commentary from Mark Brownlow on the same topic, posted just the other day: "Any list building method not based on gaining an explicit opt-in strikes me as like eating fugu, the Japanese pufferfish dish. It's expensive, not a particularly rewarding experience, and runs the risk of killing you."