Roosevelt 10C coin with different rim thickness

I would like to know about these uncirculated coins of the 1980s. As you can see the Rim is thicker on one side than the other. I have coins that the one side has a wide rim and the other side has a small rim. Or, the wide rim exists on one side and the rim on the coin at one spot goes down to nothing. Can anyone tell me about these coins. The dates vary but the same type of error is on each. If they have any value how would I go about finding information and selling these coins. I appreciate all the help and advice I can get. Thank you for your help and guidance..