Probably would be worth picking up assuming 1) you can find them and 2) they are still slabbed and haven't been resubmitted.
Here's another play for you...PCGS has graded:
PF68....684
PF67....206
PF66.....71
PF65.....36
PF64.....17
PF63......5
PF62......2
No idea how many of those haven't been cracked out