Read a wide-ranging interview with Takei and get confirmation that TOS did not employ invisible stagehands.
IDIC pendants, all the scripts, even actual film footage from the set. Gene Roddenberry had collectors in mind even as the show was still in its first run.
If I had a time machine, I would return to August 1966 and pay AMT to make me a Galileo. And I wouldn’t need to bring much cash.