I have a screen like this. what is it worth really?

I saw this gamma world screen on amazon, they want a stupid amount of money, $299 new and like $180 used.  Apparently it came with a 8 page adventure or something, I only have the screen.  Is it worth anything to anybody?  Here's the link to amazon http://www.amazon.ca/gp/product/0935696784/sr=8-2/qid=1398117743/ref=olp_product_details?ie=UTF8&me&qid=1398117743&seller&sr=8-2

So just to reiterate, I have one of these, its a bit beat up, however I'd like to know if anyone is interested and what it might be worth.  180 - 299 seems a bit excessive.