Covid doesn't explain the state of mail/internet order these days... The truth of the matter is any Joe Blow can go into business by calling himself something cool like "Quadratech", and set himself up as a third party drop shipper on the internet. All you need is a slick website. It's a lot easier and less expensive than actually having a warehouse, stocking goods, and providing customer service.
The third parties love it because they get paid up front, yet they're not the face of the transaction. As a result, there is no incentive to provide a quality (or complete) product... And that's If they're not outright lying about in-stock merchandise and even supplying product at all.
Hide and watch-- As internet commerce continues to unravel because of lazy and unscrupulous business practices, there will be a return to brick & mortar enterprises catering to buyers who are sick of getting burned and who demand on inspecting the merchandise before purchase. Some of you are old enough to remember the Sears or Montgomery Ward "Catalogue Store". We just might be heading back to that, and that would be OK by me.