I joined this local neighborhood-specific network a year or two ago. https://nextdoor.com/for_sale_and_free/?init_source=more_menu
The site's "For Sale" section seems workable as a local networking alternative to "yardsale" types of selling and, in my area at least, it can work well for miscellaneous homesteady type sales too (like offloading extra eggs or veg if not ready to take on the overhead or commitment of a farmstand or farmers market presence).
Since the original posting in the discussion stream expresses a preference to Not have an in-person hand-off of items, ETSY might prove a better match for that goal than this specifically local exchange. But as I've gotten good utility (& free easy local "advertising") from this site, as well as good referrals and responses when looking for labor (from finding an Electrician to hiring a 1-day tree planting helper), it seems worthwhile to add it to the broader discussion going on here... for the benefit of others with whom it might have broader application.
In my neighborhood the listing of "Free" stuff is pretty useful too, from firewood to lawn chairs, from free "rotting hay" to things that can have 2nd-life if kept out of a landfill. I've seen people posting the free trade of goods or services too, as in after heavy storm damage there have been postings by people willing to clear downed trees in exchange for keeping the wood, etc.
I've used eBay in the past, both as a buyer and small scale seller. I echo the sentiments here that in becoming more "refined" and more deeply monitized than it was 20yrs ago, it lost many of its best features to "improvements". As is often the way of things on the internet, for those of us old enough to have been early-adopters... there is a clear case to be made that earlier versions are generally much more user focused, and that's nice while it lasts. For this reason I would personally much prefer ETSY "these days" over eBay for selling items I prefer to ship or specifically want to cast a wider for than "local".
For yarn and needlework supplies, I remain loyal to and forever impressed by Ravelry.com -- a terrific global community network that is, IMO, really well run, easy to use, it's free, non-predatory & non-explotive of its users, and operating in congruence with its original standards and values. No signs of selling-out in the ways that so many other networking sites of its vintage have done, so I can't help but add a "shout out" to Ravelry here for all things yarny (including easy low-level small-item buying and selling without added fees). And mentioing Ravelry reminds me to mention that if items you're selling fall into a particular interest area, profession or hobbiest area, you may be best served by searching out Yahoo or MeetUp groups or other guild-like associations or clubs for posting your sellable items to a more targetted audience. In my experience, such groups often have a "Sell & Swap" page where you can post items for free.
But returning to the "Nextdoor" site again for a moment, just want to add that so far I've continued to be pleased with the leads and referrals that I've found there. Free to join and I've seen no obvious downside to giving it a try to explore whether there might be an active enough node of subscribers, near enough to you, to enjoy Permie friendly benefits like to swapping, selling, collecting free stuff, finding referrals, posting one's availability for various odd jobs, etc. In someways it is similar to and overlaps with Craig's List, but (so far) in my area Nextdoor *feels* to me like it has a lower sleaze-factor... maybe because it's not as widely adopted yet. In my area there are often safety notices posted by neigbors, Re: Things like car break-ins; Coyote citings; Lost pet notices; and the occassional police bulletin too.
How vibrant or useful "Nextdoor" might be in any given area seems likely to be highly variable. I have no idea how widespread the use of this platform is across the US, but I've found it to be a positive enough experience to be worth passing along to any who are curious to explore alternative avenues for networking around goods, services, info and land too. I've had no trouble with spam or other invasive practices, but I do use an ad-blocker on my system so I may not have the same on-screen site-browsing experience that someone without a blocker has.