Some coin advice please

What's a BH?

I really need more info. Depending on which coin,what year, condition and where it was minted it could be worth 20 dollars or 68000 dollars. According to the 2011 Red book.
 
I was in dollar mode and was not thinking about nickels.

There are some Buffalo nickels that are key dates and are quite valuble.

1916 double die obverse
1918d with 8 stamped over 7
1921s is worth a little
1937d with only 3 legs on the buffalo
 
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