The cost of refractors and telescopes in general don't increase linearly with aperture. Certainly some sort of power law or exponential trend. Custom made One offs, which this looks like to be, can fetch any amount the "payers" see fit.
I Wouldn't be surprised if this monster tips in at over 1 million dollars, plus software and transport costs.
I wonder if the optics are diffraction limited and does it come with a second lens.
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