Between the scammers, the tire-kickers, the fees, the authentication hassle, the 1099, and the death of the auction format due to out-of-control sniping, I stopped selling on eBay. I wish they would use an auction extension format like other online auctions, if it were a true auction site again, it would be reinvigorated for collectors. But they have moved on from that and just want it to be a high volume retail site. Don't get me wrong, I'm not say that eBay is awful, but on balance, I just don't find it to be worth the effort anymore, and my last sale on eBay was about 5 years ago. TBH, the signal-to-noise is so low that I don't even go through my searches anymore as a buyer.
The only thing I can imagine listing on eBay now would be a watch with a really significant flaw, like a repainted dial, that I just wanted to disclose and let it find its correct price/buyer in an auction format. Of course, I don't deliberately buy watches like that, but I do sometimes buy lots. If the value is less than about $100 though, I just give it away.
I sell in a combination of places. Here on the forum, other forums, on IG, in-person, and I haven't had trouble selling most of the watches I want to let go. A few lower value pieces haven't sold, and I just put them back in the drawer or gave them away. In the future, if I have trouble selling a $10k+ watch, I might put it in an auction that I trust.