Amazon purchasing rule of thumb used to be: "no electronics."

Then it was updated to include "nothing that goes on or in your body."

Then it was updated to include "nothing that goes on or in any living thing."

Then it was updated to include "nothing you wouldn't by from a random stranger standing outside a fly-by-night flea market."

For thousands of years, brick-and-mortar stores have lived and died by the quality of their merchandise. Amazon is just learning this.