Info Wanted: Need help naming items and their worth

I have recently found in my belongings 24 different stamps? from the first Star Wars movie. I call them stamps because they have a preforated edges and have a lickable sticky backside (however they are not licked) I wanted to see how much they are worth and where I can sell them for the highest price. Any and all help would be greatly appreciated

I can email a photo to whoever wants to see them cause I don’t see where to upload an image

You can use a service like imageshack.us to host an image, then the 'tree' looking icon, is the insert image function.  When do you think the stamps were made?