I haven't searched for RPM's before, so it's hard to tell
PMD from RPM.
#1 1980-D
I don't know about this one. Here's what I saw when I found it: Split upper serif, likely to have split lower serif if it weren't for damage, vertical bar inside primary MM, outer part of D to the right of the primary MM.

#2 1981-D
I have similar cents like this one with just the split upper serif

#3 1980-D
One of a few possible split upper serifs

Are these RPM's or am I dreaming them up?
Thanks in advance guys!