I'm working through this thread and only on page 1, so I'm sorry if this gets addressed later in this thread (which I will finish today I hope as it is VERY interesting), but I need to comment here that maybe, just maybe, those that have raw copies of GA keys are very sophisticated collectors. They have done their own resto checks and grading. And they probably know that the big auction houses will take care of the slabbing themselves if or when they were to sell, so there is no urgency to slab for these collectors.
Just my 1 cent