MUHAMMED ALI VS SUPERMAN

With the all the talk of what the 1st issues of Super man and Batman were sold for, I got thinking of some of the comics I have.
I have a gang of comics from the 1960s, 70s and 80's and I keep thinking if I should part with them. They sit in a box and maybe every 2-3 years I bring them out for show.
I own some comics I cant pair with, like  the SECRET WARS series, ROM THE SPACE KNIGHT #1 and some Spiderman.
I had a bunch of comics stolen from me back in high school, so my collection dropped to about 250 comics. Even at 250 comics, I do not have the time to research every comic for its value.
I came across this jem which I never owned, you would think it would be some serious coin...it is worth 80 bucks.
Shame.