250 is ridiculous, just buy a lavalier mic and put a face mask on at that point

That is way too expensive for a product like this, that also might not work for its intended use (if their nose isn't fully covered like in the picture, I'd expect the screaming to leak out quite a bit. Might've worked for my idea of using it for call privacy (speaking softly) but still that's way too much for something that'll probably only be useful for that niche use-case.