I have an original. I also have the YUM! original, and several macOS launch posters. Unfortunately, most of them have been folded and have pretty bad creases in them. I wouldn't sell them though, I appreciate the pieces of history more than a few hundred bucks each (or even a few thousand).
The Picasso Macintosh poster is one of the easiest pieces of art to completely rip off. I remember re-creating it when I was learning the original Adobe Illustrator. Simple lines, solid colors and shapes make this artwork easily copied. And quite frankly, most of the copies look nicer than the original.