I have an idea for coop if you want to do this. It would take time but you have the pictures saved and knowledge. To many people post coins and buy coins that arent errors on here. My idea is Name every error and show an example of the error for those to see to know what they are. Then show examples of errors that arent realy worth the time to buy. But if you do this coop I would suggest that the Administrator to make this topic a sticky for those that come on here to see the examples. The other thing I suggest if you do this coop that no one replys to the topic just look at the examples and learn. The die varieties well thats already taken care of through coppercoins site at
http://www.copercoins.com. Even though coppercoins site only shows examples of cents its still a great way of learning the basics of die varieties and what to look for. Another good site for die varieties is
http://www.traildies.com. This site shows examples of trails that come off letters numbers etc. Alot of people get feed finger die scrapes and trail dies mixed up. If you want to learn about trail dies this site is a must.