One poster I always wanted was a Pirates of the Caribbean which had a skull and cross bones. The lenticular was with no other writing other than a date at the bottom and you could only find these at Circuit City.
I tried to buy it for $300 but they wouldn't sell it. They told me that the manager was under strict orders to put it in the shredder. I told the guy I would pay more and that I would come by late at night with cash. However he still wouldn't do it.
I then found one years later, on Youtube. It's the only one I've ever seen.