~~~ the jetons walking and leaving the country, I doubt very many who are holding the rarer pieces are willing to broadcast their holdings in fear of it looking as though there's a ton of the stuff out there... Most rarer material (from any gaming jurisdiction) usually trades hands out of the limelight... and very few who have actually gathered up the material in the early days will even mention the quantities they handled.

Regarding the 10% to 20% estimate, you'll probably not even account for 2% as very few collectors worldwide even visit this board... or even eBay for that matter as most serious collectors rely on personal contacts and hardly ever broadcast their interests... I do realize you're having fun, though... and that's good.