I have the opportunity to buy some silver dollars today and one of them has a CC mint mark. At this time I have no idea what the date is. I know that a bunch of them were found 10 or 15 years ago and I am wondering if there is still a premium on their value over the other mint marks. I know that silver value is around $30 so I will be paying less than that but the only price guide I have is from 1990. Is there still a significant prremium on these with the price of sivler so high or are they like our silver strikes and only worth the silver value?