Thanks for the link.
I had a Shelby GT500 Mustang, 2011, and Ford could tell you exactly how many of each color, then how many of that color with different options. You'll think Harley would do this to make the CVOs just a little more special.
Several years ago when the CVOs were assembled in a separate building and built by a team and not assembly line that might have been a selling point. Now that they just run a CVO on the standard assembly line it has become more of an option package and not a true CVO (In my opinion.)
As far as the car market info I would bet that comes from a mentality of keeping the car stock just like it came off the assembly line and valuing a matching number original vehicle. Harley has always prided their bikes as being a blank slate that you made your own(if you listened to Willie G at least) from their very thick accessory catalogue, so in that vein a factory stock Harley may be a rare thing.
As a side note I contacted GM Heritage center about a 1947 Chevy I own to get the build sheet info and I was told that that paperwork was thrown out several years ago and there was no way to get exact info on my car. They did have about 100 pages of general info though. Interesting what some companies consider important history and other companies don't.