This is really bad news. I have seen multiple sellers with this unnecessary condescending attitude as you mention. Even when their city is under social-distancing restrictions, they are insisting on pick-up in person and coming into their house to "sign off" that the goods are working.

Someone needs to take these lemonade-stand sellers down a notch or four. Were ebay to extend the feedback mechanism to pre-bidding / pre-purchase queries, the participants would be forced to clean up their act. It seems that ebay is not incentivized (enough) to do this, and so the situation persists.