Comparing tiny piece of ordinary comercially available plastic shaped into rounded triangle to master violin bowis quite wrong, IMHO.
The material for good bow is hard to get almost extinct species and also silver, gold and ivory are not cheapest materials either. Add to that VERY qualified and skilled work of master bowmaker.
You can buy PMMA, polyimide or whatever other material in sheets and 10 y.o. kid can shape it to rounded triangle and polish so 90% of the cost is in the material of which only PMMA and polyimide can go for more than $5 per pick if you buy in bulk (I haven't found a source for sheet casein plastic yet but I don't think it will be more expensive than that). Many other materials of so called boutique picks can be had for few cents per pick.
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