Worth anything? Bullitt Banner.

I have a 4ft X 12ft plastic banner that Ford made to promote the car. It looks like the common poster, the one that says "Just in case they're planning a sequel". Very few were made by Ford (somewhere around 20). I happen to have one, and am concidering selling it. I dont know what to ask for it, but am open to offers. I like it but need money and would sell if I think it's worth it. I figured this was the right place to come.