I bought this Indiana Jones movie poster that contains multiple signatures, but need to authenticate it:
Harrison Ford
Sean Connery
River Phoenix
Karen Allen
Steven Spielburg
John Williams
John Ryes-Davis
and one or two more I can't read or don't know.

I bought the poster off eBay in the early 2000s, approximately 2005. I don't know if it's authentic, but the listing at the time I remember stated that it was authentic. Of course, it did not come with a sticker or letter. I have put in a request to eBay for my records from that time. I'm hoping to find the seller's name so I can try to contact the person. I doubt any of that will come to anything, so I thought I'd post here. I did submit the image and more close-up images of the signature to the JSA website for a quick once over to see if there's any chance of validity, but the person they sent the images to wants more detail regarding the purchase. I'm working on it. One thing I do know is that the signatures are no reprints. Upon very close inspection, the signatures are indeed wet ink signature, not pixelated pixel dots. Of course, even though they are wet ink signatures, they could be forgeries.