"Yes, that find was so important in many ways and I am glad you are familiar with it and agree it is historic.
The original BTF I, II, and III costumes out on the market came from "3" primary sources:
#1 The wardrobe rental house find of Roger Sides. Which included various pieces from BTF ! and II. Biff's gang, supporting pieces etc.
And then for the hero wardrobe of the principles:
# 2 A storage container that was stored on the backlot of Universal Studios in Studio City, Ca. ( since the wrap of BTF III ) that was emptied to decorate the BTF Ride attraction. Costumes were "rescued" by one of the coordinators on that project and sold privately. He also had a ton of original props including all the Hero hoverboards.
# 3 - They were "saved" from Universal Studios wardrobe rental department at the studio.
At the time Universal did not care about any of the Back to the Future costumes ( or props ) they were renting. All of them including Hero pieces. They were rented for a daily rate of $35 to $75 to other productions. The majority of these pieces were eventually rented by collectors / brokers posing as production people in the early 1990's about 20 years ago. When rented a replacement value was assigned to each piece. The pieces were not returned and the replacement amount was paid to the studio, which they happily accepted.
In the case of BTF, many Hero props were rented, but then duplicated, and the replicas were returned to the studio. At times the studio was happy to receive a piece that was altered or painted. Considering it enhanced. They could care less about the originals.
Battlestar Galactica Hero miniatures were rented, duplicated and replaced. To near perfection.
Night Gallery paintings were rented, duplicated and replaced. Also to near perfection.
1960's pieces from the Munsters was rented, duplicated and replaced. Including Spot's color ( The giant Dragon under the stairs ).
In the case of Logans Run, the costumes were found at Sony Studios ( formerly MGM ). The Hero Sandman costumes were gone, having been located at Western Costume, but the supporting actors costumes and citizens costumers were once again hanging on the rental rack at the studio. The key wardrobe supervisor sold them openly as surplus. Same with complete Child Alien costumes from Close Encounters of the Third Kind ( Mask, head, and feet. ) Columbia was also sold to Sony. I have no idea if he pocketed the money, but that is very likely.
Same with Ghostbusters. Sony was cleaned out. Hanging on the rental rack back in the day."
Its really cool to read this. It clears up alot of the stuff I've heard over the years and proves that, indeed, alot of the stuff in private collections today is out and out stolen. Of course its all under the bridge today but I really appreciate that basically half the history of 1990's props in a nutshell is right here.
So can you add to the interesting story of the secuity guard at Warners and his single handed "reaping" of the Batman department after "Returns" and the two "Spiderman" suits that went walkies from Sony. More stories I'd love to hear the truth behind....if you know it.