EBay, Collectors, Flea Market & Antiques

I only have a few of them and rarely buy anything on eBay, but I haven't had any issues with notifications. A couple are relatively new. A couple have been in place for several years.

I have noticed that I've started receiving e-mail from other senders from whom I hadn't received mail in years, but I discovered that my e-mail provider had been tagging them as spam and putting them in a junk folder I very rarely check. They weren't important, luckily. Perhaps that's what happened in your case, though it's certainly possible it was just an eBay issue or some kind of refresh.

As for sketchy sellers, it's been my experience that there's always been a segment of the seller base that fits that description. Perhaps there are more of late, but I don't frequent it enough to have noticed. I have read that a lot of people joined or rejoined during the pandemic to supplement their income.