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Condition of $1 Silver Certificates is paramount mostly because they are so plentiful. To a new collector, these might be treasures, but to experienced collectors, these would be passed over for nicer examples. The BEP printed over 5 billion 1935E $1 SCs, among them over 252 million replacement notes. I would put them in currency sleeves, and put them under a heavy book for a few days to get them to lay flat.