That list of known serial numbers represents intellectual property which has real commercial value.
I will contact Robert Graham to see if the owner is prepared to give you or "everyone" as you state, the information for free or at all on this one time basis only.
As far as your impressions of there being more than 25 well based on my experience with reporting to the registers of various notes I can tell you that the number will almost certainly grow beyond 25. However only 25 are known and confirmed to exist at this point in time. I can also tell you there will likely be those who jump in this thread with stuff like "I have one in my closet" " I heard there is a hoard" etc etc. That is to be expected and is so predictable it's tiresome. I will be here until the end to find the truth and reveal any false or unvalidated information that manages to find its way in here.
But I assume you understand the essence of how this whole register thing works anyway so I do not accept this is a reason to deviate from what I argue is the most honorable way to proceed to validate a claim I have made publically.
You are of course free to do as you choose, however should you wish to do business with me in the future I would ever so gently request that you 1st contact me to find out what proof I have before determining whether or not you need to post like you did in an online forum, particularly one where I am a member of, seems almost silly. If after receiving the information from me you still feel you need additional validation then by all means go for it in a responsible manner. I have been contacted countless times in the past by informed others with similar "impressions" who seek proof of claim and validation and you certainly were the 1st to go about it the way that you did.
If this request is something which doesn't strike you as being honorable and the respectful thing to do or outside the scope of what reasonable men, experienced in commerce, should do then I would respectfully submit we have a difference of opinion which cannot be reconciled on the very serious matter of how best to do business.
This forum often questions seller practices and now you have eBay's leading seller of Canadian paper money putting the shoe on the other foot here and challenging you to elevate your own practices, while this may seem unnatural, it is very appropriate in this case.
Troy