To me, the challenge of FH was always finding a well-colored, structurally-nice copy. With Jungle and Jumbo, finding a 9.0+ copy that had true-ish color was the grail. For those titles it was doable since they were relatively common and the chances of finding one that fit both criteria was not impossible. I found Planets to be popular enough that the top tier combination wasn't as available and, sometimes, I had to settle for just having a copy. As we go through this serial display, it reminds me how much work I still had to do on my Planet run. Even though it was 'complete,' much more than half the run could have been upgraded to something better.