This is pretty much my view. Barring someone who was on the inside actually sharing the facts, the best indicator is going to be gotten by examining the market and seeing what's available. Because regardless of the print numbers, unsold newsstand copies were sent back and destroyed. And examining the market is going to be a better way to establish a value than the print numbers anyway. If a million copies were printed but none are on the market, if one goes on the market, there are going to be more buyers interested than a book with a small percentage of newsstands printed, but is readily available on the open market.