Companies selling lists of market research companies who will pay you to complete internet surveys are just one of the pit-falls to avoid. Whilst there is nothing illegal about companies selling lists of Paid Survey companies, there is no point in buying it.
All of the data about honest paying survey sites is available for free. Do not pay for public domain information under any circumstances. A quick Google search should bring up a list of honest sites. Since these survey sites often pay a commission to existing members for each new person they introduce their is no need for anyone to sell you a list other than greed.
Another similar method of people profiting from information that is already freely available is eBooks. Thousand of eBooks can be picked up for a single cent from eBay, whereas other sites may try to sell you the same thing for $30-$40.
Again the message is simple, look around and research before you part with any money.