Silver Dollar At Bank

I just found 4 90% silver coins in a $500 worth of half dollars I ordered in February.
Yes it also amazes me the tellers dont keep coins for themselves but maybe ...juuuust maybe, they are keeping them for us/we collector types

at the bank I work at silver dollars show up once in a while, they tend to get jammed in the coin machines of the four (one peace and three morgans) that I know of that have been found they where all found by other tellers although the Peace dollar was later given to me by the person who found it. I did manage to get a hold of two 40% silver ikes though, but idk if you count thoughs as real silver dollars or not