I have tried to contact sellers about these balls on occasion and most seem to appreciate it that I am alerting them to a preprint yet some get nasty about it. I have mostly given up on contacting people now but just sent this seller an email to see if/how they reply. I had to save it just in case it disappears. I did ask to see the Beckett cert, if it was in fact for this exact ball. That would be a keeper for sure.
http://www.ebay.com/itm/1976-All-Sta...EAAOSw65FXvgII