How can such a high cost be justified for these sound microphones?

please check the attached image below, can anyone provide me some links please :) ebay and amazon links accepted.

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has anyone used an MS stereo set, MKH416 ANd MKH30 as MS on orchestra?
i own a mkh40 too, but i need it on a cembalo, so was thinking to envolve my 416 closed in my boom. thanks.

I would like to know your opinions about the use of the coincident setup above (blumlein) in nature soundscape recording.