In my opinion, surely you should try to ascertain that what you have matches known examples. Then the quality/potential grade of said coins, before trying to tag them with a value. https://doubleddie.com/ http://varietyvista.com/
Well I just posted on this value thread because I'm not used to this site but you're right I'm not trying to get a value estimate I'm just trying to get a feel of what constitutes a worthwhile error. Sorry
IMO, FWIW, is you should make an attempt to identify the errors, then submit your question(s). Indicating what you think is doubled would be helpful. Use the sites others have provided links to and work through the process because it will save more of your time and in the end, you will be able to put aside questionable coins for further evaluation.
Notice how the letters are so close to the rim and in some cases merge with the rim? That is Die deterioration doubling from the dies being overused and start to spread from the center out to the rim. Common on many coins. No value over the face value of the coin. IMO, Jim