The one this Ebay seller has, he just won it at auction in August at REA for 198K:
https://bid.robertedwardauctions.com...e?itemid=88266
This seller buys most if not all of his balls from the major auction houses and then throws them up on Ebay. So if you are just seeing it on Ebay, means you missed it at auction. He does find some cool ones, but his markup is insane.
His claim of 1 million is off, because again it just sold at public auction and it did not reach 1 million, not close. Not sure it jumped that much in 2 months.
Also, while very rare, Gibson signed balls do seem to come up from time to time. This 198K was the most one has achieved, usually they had been in the 20K-60K range.