Queen Rare Picture - value

Dear QZ,
I'm in possession of the rare photograph from Queen's concert in Zagreb, Kroatia in 1979. At that concert, there was just a single photographer allowed for the media, so this picture is pretty rare.

I'm not a queen fan, but I'm in possession of that piece of rarity. I know it sounds like a sin to you fans :), but I'm interested how much is it worth. It's a 20 inches x 8 inches picture of Freddie.

Thank you,

Best regards.

Paul

well theres no picture of it

Yeah, might be good if we saw it :)