I know damn good and well the years of effort the authors have devoted to producing the most accurate and reliable guide imaginable. And I appreciate it more than I can say. I would not have become so involved in this hobby without such a great reference. But I'm convinced some of the price differences between 6 and 7 are NOT based on actual sales, but on the values listed in the first "official" book. Not only do KMW need to keep putting out the Rack, they need to stay on track, and not let CW derail them and define the market.