We buy traffic for our entire portfolio of properties (look at our iTrader) and we have a few simple tests to see if your traffic is valuable. One of our tests we do with every new source of traffic is to see if their traffic produces voters on our site: http://threegreatest.com If your traffic cannot produce any voters than it is probably not very real. We have a regular set of traffic sources that we spend thousands of dollars with, but all have to start with our 3 Greatest test and produce. So do you have quality traffic that might produce results? If so, drop us a line, we have money to spend.