This is what is known as "anarchy of production" which is a key feature of capitalism. A global crisis like this is not compatible with our existing economic systems.
Based on my experiences buying other things on Amazon, there will be a "masks" factory. People will be churning out tons and tons of counterfeit N95 masks. They will invest in printing believable CE marks and putting all the touches that would be present on a medical-grade mask. And people will buy them believing that the masks are high-quality and that they are safe wearing them.
Pay ten bucks per mask - and soon enough in every basement there will be a masks factory.
At least until OSHA comes after them.