Purple: Prob 2 incarnations, For now, I'm giving myself a decade to annex the more scarcer ones that are still relatively inexpensive. I do have a complete run of Invisible City and will post 4 & 5 shortly.
And of course the not so trivial matter of locating a copy of Write. I don't know how comprehensive a list you'd get by aggregating those three publications you listed. As you say, they must have missed some items here and there. I get the feeling that there must be some 10-20% that you just can't find very easily (and some we just don't know about; magazines, etc.). And how often do The Genius of the Crowd, A Signature of Charles Bukowski Poetry or Bukowski Signature 2 come up for sale even if one could afford them?