Errors and varieties are not very hard to find when roll hunting.
I think anyone here looking through $25 boxes will find the following with only a little dedication:
'98 & '00 wide A-M - Maybe 1 in every 10 dollars of '98 & '00 searched
1972 ddo (minor types) - Not sure how common but they are fairly common
1995 ddo (maybe) - Maybe 1 in every $50 - $75 of 1995 cents searched
1984 ddo (less likely) - pretty rare 1 example found in $150 not sure...
die cuds, off-strikes, filled dies are also fairly common in both copper and zinc years.
I have had a lot of luck sorting by year then assembling them up on a table. 200 cents by 100 cents and then just go down the rows with the 5x glass. pull the rows as you look at them. assembly is easy if you have a yard stick. After a while the chore becomes the task of sorting them initially...
just thinking of this process makes my neck & back ache a little.
~JobIII