From what I can read you partly instigated it. You're both as silly as each other. Move on.
His advice that the lens is not worth that much is 100% sound advice, as it's not worth that. Does it mean that we can find them easily for under that price? Probably not, but that's also not what he said.
There aren't many 1.5x anamorphics, not just for that price, but in general. Does that make them better than other anamorphics? No. Does that mean you should pay silly inflated prices for them? Let your intelligence and wallet be the judge.