I saw this lot on marketplace yesterday with only 1 photo but I could see 2 of the chassis so I jumped on it. All told there are 6 chassis in various states of dress 40ish motors, 3 pistol transmitters, 8 or more twin stick transmitters, receivers, servos, only 1 or 2 speed controllers, 1 body, and a bunch of other stuff. Tomorrow if I have time I will start to organize, catalog and test everything.
It's for testing and tuning motors but I'm not exactly sure how it works.