Yeah, this list is no substitute for the knowledge of an expert who knows a market really well. But if you're getting into collecting a new title, or want to spot check the true scarcity of all Gerber 8's, or anything like that, it's a very easy way to get a hugely valuable piece of info, and all the data points you need (value in unrestored 2.0, number of copies on the census) are available readily.
My Windex scarcity rankings have another factor which is harder to quickly collect (basically, a census of copies sold in public venues or currently available in inventory lists), but it's built on this principle. I'm never going to have time to complete it, so I figured I might as well publish the foundation of the methodology.
quite honestly, I consider it ground breaking... and a wonderful tool ..nice to know "how"