She won’t get Jack $#!+ for finding them, except for the social media bump. There is virtually no way to determine the value since it is all on display and not liquidated. Maybe, just maybe, she could get 10% of the value of the weight of the silver. The coins are the size of dimes 900 dimes equals 75 ounces at 8 dollars an ounce, 600 dollars times one tenth? Jack $#!+.
Silver’s hovering around $31 an ounce right now.
Of course the real value would be in the antiquity.