this item in particular or any item and why do you say that?
I’ve never used it but I have a lot of shyt I want to sell rather than throw out
so I was considering it over ebay
Internet meetups for high demand and value items aren't necessarily safe. You can do them in public and still end up in a bad situation. I mean the odds aren't exactly extremely high that happens but it's still a realistic possibility. I don't really see it as worth the risk especially if the seller is really looking to exploit the buyer and do a high mark up on the item.
I sell stuff on FB Marketplace all the time and it at least in my area is pretty crappy. I typically end up taking less than I could get on eBay there. I sold my Galaxy Buds Live for $90 when I probably could have gotten closer to $110 after fees on eBay. I sold my Bose Soundtouch 300 for $200 when after fees on eBay maybe I could have gotten $230-$240.
eBay is even more dangerous than FB Marketplace because if a buyer wants to scam you there eBay will almost just let it happen. In a dispute eBay typically sides with the buyer over the seller.