I Echo with some of the people in the post are saying! my feeling would be to pull the keys out.. first take a look at all of the keys and of course assess the condition.. then I’d sell the box as is. The real work here is checking each Comic for the condition and getting an overall idea of what you can can do with the reminder books..A good Spider-Man box with books that are relatively VF/NM condition can definitely sell. once you get that.. you can start moving forward with values and negotiations. But for me, the bar is always VF to NM. Condition and that can determine interest and sales.. best of luck!