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Kind of, compared to high-volume products most consumers are used to see. R&D gets expensive fast.

Just try designing these up to first partial prototype and try calculating cumulative man-hour spent x local minimum wages x highly optimistic sales^-1 = pure R&D cost per unit before any manufacturing or even design reviews. It's not going to make a lot of commercial sense.

3D printing people sometimes says dollar stores makes them feel defeated. I'm not yet at that level but it's true, a 10-pack ball point pens at $1 makes very little sense if you knew.