Even $8K he has not justified. A quick search shows $10K for 0.05% accuracy out to 1MHz.
OK, some misinformation here. You claimed your LCR meter can measure up to "0.05%" of accuracy. How does that equate to .004dB at 20MHz? Seems like a slight of hand. Unless you are referring to frequency response of .0004db at 20KHz in which case you sort of changing your story. I don't see how .05% of LCR can equate to .004db at 20MHz. Anyway, if your meter can't measure the difference between silver and copper cables at 20KHz, I am not sure it is worth that much, because anybody can clearly hear the difference between silver and copper cables. Oh wait I know what you'll say. You say these people are all delusional and you're right. I guess it's the case of the whole world is wrong and you're right.
But data will not be on your side here. No two cables will measure to have exactly the same LCR. But oh wait I know what you'll say since you guys are all too predictable. It's all "below human hearing threshold". Like parrots repeating each others. But a lot of these guys at the so called "measurement websites", have no clue about the science of human hearing. If you have no idea about human hearing, how in the world do you know something is below the human hearing threshold.
I have to laugh at some of the attempts of these guys trying to measure cable frequency distortion. They would compare the distortion of two cables, and declare that they are close enough to be all below human hearing threshold. They actually tried to show off that they could measure up all the way to 100KHz. I had to laugh. A flaw measurement doesn't make it right even if you can do it at 100KHz.