Circulating Coins

What are some commonly circulated, but rare/valuable coins?
I’m going to my local banks and sorting through coins and trying to find things that are more rare/valuable. What are some common rare/valuable coins in circulation?
Error coins are out there as well as doubled dies mostly in the cent. There are still 40% silver 1/2 dollars out there in bank rolls. With all the state quarters there are errors there also. A book on error coins would help so see a coin dealer or maybe a library. I do not collect them so only have the ones listed in the Red Book (guide to U.S. Coins). the cents to look for are 1970-S small date actually it is a high 7. And the following doubled dies 1969-S obverse, 1971-S obv,1972 obv, 1983 reverse and 1995 obv. There is also a 1984 double ear as well as the cents that a proof die was used on the reverse. They are 1992-D close AM (the AM in America almost touch) & 1999 wide AM. You need to pick up a book or two for they will really help your quest.
Korean Type Set Coin Collection (한국은행 주화) 1959-Present