The Montana and Rice are both rookie cards in nice shape. The Barry Sanders was produced in the ‘junk wax’ era so they made a bazillion cards so it isn’t worth much even though he was one of the top 5 running backs of all-time, IMO.

1981 Montana rookie is worth several hundred and the 1986 Rice rookie is worth about $50.

The 1955 Clemente rookie in the bottom right is worth MUCH more than all the other cards combined if real and graded, would be a $1 million card in PSA9, but looking at it in your photo it might not be real.

Overall a very nice group of cards!