DC Comics SIGNED The Death of Superman Comic Book

DC Comics SIGNED The Death of Superman comic book signed by creators Brett Breeding and Don Jurgens. Book itself is in good condition with very little damage. The only issue I see with the book is that the ink from the creators signing has stuck to the protective sleeve. Most of the dirt has you see is on the plastic sleeve and not the book itself. There is a small orange line on the certificate of death but other than that I see no issue. I have not removed the book from the sleeve.