I wouldn't mess with any of his modern signatures, too much variation. His older signatures are more consistent.
no idea what ebay's current policy is. that used to be the case. I don't believe ebay cares one bit about forgeries.
Ebay does care one bit about forgeries.
In past years, Ebay would remove an auction that failed QO.
That is no longer the case, and nor do they remove auctions that have COAs from their on Banned COA List.
It's all about the dollars for EBay.
like I said, if you are looking for a koufax, go for his older signatures, they are more consistent, and much nicer.