The problem is that a lot of these online eBay sellers are drop shippers - the item never passes through their hands so THEY may even be duped and scammed by the supplier on the other side of the transaction. It's hard to tell from the listing sometimes whether the item is being drop shipped. I have said this before on this board but I avoid anything that's obviously being shipped directly from China and anything with a price that's too good to be true. So far that wisdom has served me well after making a mistake.

BTW, this wisdom also applies to surgical masks. I paid for KN95 masks, and they were labeled as such and shipped from China. They did not pass the YouTube suggested "water test" to determine their quality. Believe it or not, the similar masks I purchased at Ocean State Job Lot passed the water test even though they were not labeled as KN95 masks. Man you have to be careful!