I have not ordered masks from Amazon. But I recently ordered Paul Newman Salad Dressing that had been discontinued. You had to buy 6 bottles. And since it was a discontinued item the third party store charged about 5X the standard amount.
I got the items. It was filled by Walmart and was the new version of salad dressing. BUT the box was never marked as delivered. So I can not return the 6 bottles of salad dressing that I do not want. Plus, if I ordered the new version from Walmart I would have saved about $50.
After this experience, I will think twice before ordering from Amazon.