$1 Coin questions/variations/errors?

Just wondering. Usually when I go to the bank, I ask if they have any "loose" $1 coins. Over the years I've gotten some SBA's, Sacagawea, and Presidential coins. I was wondering if there are any variations or errors I should be looking for. Thanks

 

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any 1971 - 1976 with an "S" mintmark (40% silver) ($10)
1972 type II ($15 - $20)
1973 / 1973D ($3-$6)
1979 P wide rim ($10-$20)
1981 P/D/S ($2- $5)
2002-2008 sacagewea ($2)
2012-2014 presidents and sacageweas ($1.5 - $2)

 

Always look for errors!

When I go to the bank, I always ask if they have any "broken" coins!