They have value, but they are common. The first one goes by the nickname "Woodchopper Note" and is probably the most valuable. You can find these on ebay and see what they are going for.
Yes, they are certainly collectible and will command a decent price, but they are not particularly rare or in great condition. You're probably looking at $100-200 for the Series 1907 $5 United States ("Legal Tender") Note, $50-100 for the Series 1917 $1 Legal Tender Note and maybe $50-75 for the Series 1914 $1 National Currency Note.
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