I have a vintage Apple Macintosh poster 1984 Picasso Mac logo in the original tube. It has never been removed. The poster is as new. The tube originally contained two posters I took one out in 1987 when I was given the sealed tube. I worked for Apple at the time. The other poster is lost to history. Apple Part No M1106 Mint condition with Tube. Size: 22" x 28" How much is it worth?