In a recent social media post, Guardians of the Galaxy director James Gunn shared one of what he said was a number of gifts he's received from the folks at Marvel: a special metal version of the Mondo Posters Guardians of the Galaxy poster by Tyler Stout.
You can see Gunn's Facebook post, with an image of his poster, below.
In addition to being released as one of a number of Mondo posters for the film, a cropped version of the Stout image was also attached to a limited-edition run of the Guardians of the Galaxy Awesome Mix Vol. 1, seen at top.
While we can't find any specific mention of a metal version of this particular poster being available from Mondo, they did offer a metal Man of Steel poster during that film's opening weekend. It was limited to 130 copies and could have cost you $300 to get during the one-day availability. A commenter in Gunn's Facebook thread seems to imply that this one was available in a limited edition of 30 copies in metal form.
Gunn is currently working on a script for Guardians of the Galaxy 2, due out in May 2017.