There are only 6 known to exist with the sticker announcing the Grateful Dead. There are 6-8 that exist which do NOT have the sticker. Those are obviously worth considerably less.
This poster will obviously be a very good investment. This one has some minor issues having been hung up to advertise the event, it has pinholes in each corner and a small upper left corner tear missing, as shown in the photos. This does not detract from the appearance of the poster which retains all its original imagery. There are a couple very small creases in that same corner, but this is not noticeable.
Smaller version of this same image. The item "Grateful Dead SF State Cafe ACID TEST Poster RARE 6 Known Original 1st Print" is in sale since Sunday, October 08, 2017. This item is in the category "Entertainment Memorabilia\Music Memorabilia\Rock & Pop\Artists G\Grateful Dead\Other Grateful Dead Mem". The seller is "postertrip" and is located in Oakland, California. This item can be shipped to United States.