Not sure if the site is updated however, I have a video tape copy of this show i recorded from the day it was broadcaat (I appeared in it -ahaha)
Ep 432 Thriller Dance competition episode only known to exist in an off air recording, it may not be in the ABC archives.
I have this one on tape too - 425 July 15 1984 State Heats Beatstreet competition
Sorry for the 2 year late reply. So 43 episodes of 1970's Countdown have been aired. I only have 22 of them. So if anyone wants to head over to the Countdown Digital File Sharing thread and share some of the others I would appreciate it. My list of C/D shows is there for all to see. I will willingly share copies to everyone who wants it.