Yes I agree.
I've checked out Facebook Market Place and while there is no commission charges there are a number of things I don't really like:
1. You can't auction an item
2. It's restricted to your area, in my case London and, well certainly is not Worldwide like eBay.
3. Unless you register as a business, it seems like you can't set a payment method like PayPal or bank transfer. You can deliver, have home collection of meet elsewhere (a bit dodgy!)
4. EBay security is not 100%, but I'd be wary of selling high prices items on Facebook.
I don't use social media, but I'll give it a go with a couple of low prices items, and report back!
Regards
Doug