Generally I recommend to go by listings such as on that site or better, pick up a book like strike it rich with pocket change 5th edition and try instead to just see if a coin you find is listed and match it up when new at this. Otherwise you will find yourself seeing all kinds of things that are likely not of any value and better left to when you are more experienced to try to identify rare finds that are not yet in the guides. Happy Hunting!
The WDDO-002 is a nice one to search for that has decent value and high value uncirculated. Extra thickness most notable on BERTY of LIBERTY, 2014 of date. Light thickness can be detected on IN GOD WE. This one is on those listings and also on p159 of the strike it rich book as one example.