Did your parents get scammed into a Rainbow vacuum?

I wonder if that's the vacuum that my babysitter had demo'd in her house. I spent a lot of time with her as a young child, and there was a door-to-door salesman selling vacuum cleaners whom she invited in. He gave a demo on her fabric sofa where he purposefully spilled something and vacuumed it up, like it was a miracle. I think it must have involved water because there was something about it cleaning through to the other side of the cushion. I came from a much, much more cynical family, and so as soon as he left, I said something to the effect of it being a scam. I can't remember exactly what it was, but something stood out to me about the demo as an obvious trick. And I think it was the only time she had a cross word where she snapped and said, "You're not the boss of me," I guess because it sounded like I was trying to sway her away from buying it. I was a very sensitive person, so something like that was enough to destroy me for a day and to remember for a lifetime. But she was the nicest person. She was very religious which my family wasn't, and she was a stay-at-home mother. I know my mom would have never even answered the door to a door-to-door salesman and would have instantly said what I did if she had (that it was a scam). That the babysitter was was so trusting was the type of thing that made her house feel so warm and cozy. The last time I "saw" her was on Facebook, and she was making videos selling essential oils. And I could tell she really believe in the healing properties of them.