There are several hurdles to get past.
Finding people with the materials (and willing to participate).
Making it so his archive can't be used to create forgeries, thus polluting the trade/market.
Getting "adequate" scans without damaging the source. (this is particular to bound items and the like)
The more valuable/rarer the item, the less likely it would have a "perfect" HQ scan created. While I won't even pretend to know the vastness of collectables out there, a good example would be the Zelda Wind walker Scroll.
There's a number of active members who would love to have one (it?). I'm sure they wouldn't mind having a replica PH... but it is so rare... What potential issues could arise? I'm positive that some unscrupulous person wouldn't hesitate to try to pass a replica off as the original. And how would you verify it? That's the problem with a number of items in that category. It isn't so widely known.. like.. the Mona Lisa, that it would be blatantly obvious as a fake (or stolen).
It is just rare enough, but not cataloged enough, to fall into a dangerous area for collectors. Heck.. I'd love to have a "copy," posterized just to display the artwork... but I'd 100% expect to have some watermarking or deviation as to avoid the above concern.
As I said, I don't know enough about everything out there. There are some very well versed collectors here, who don't even know every bit out there. There's just to much for a single person. I used the Zelda scroll because of its mythos. (Right up there with the FF7 crystal.)
I like the concept, and as a collector of ancient things... I've love using
Moby Games as a reference source.
Just be careful with your project. There are those who would take advantage of it for personal gain and damage the collect-ability of items.
A similar example was done with the Zorkmid, from the Zork Trilogy set. Not only via molds (the earliest of forgeries and fairly easy to spot.. especially is using resin or plastic) but, later commissioned as 3D printed metal replicas. (much more difficult to identify, if the correct metal was used and imperfections buffed out/masked)