While I agree that you can find new lower quality replacements pretty easily, the good stuff is pretty much gone. Or the price is so high it is hardly worth it.
5/6 years ago I could go onto eBay and find very nice derailleurs, cranks, brakes, etc. at pretty good prices.
This past year, it took my a few months to find a decent set of SD7 V-brakes, and I still paid more for them used than I had paid for new ones in 2013. Obviously the recall had some impact, but you’d think no one is using V-brakes anymore, they should be giving them away.
John