Didn't they have something like this about 5-6 years ago? As I remember, it wasn't too visible, so people rarely used it.
They did, and they slowly removed it. I remember (as if I'm super old) buy college textbooks from friends and stuff on it.
This seems very similar to Carousell, where you can snap, sell, chat, and make an offer. But its advantage is its already huge user base where you don't have to get people to invite people to other platform because you are already friends on Facebook.
It looks really good. I feel like the main thing that I don't like about CL is how hard it is to post something. The CL apps are decent to terrible and the post flow is so arcane. I probably still won't use this, but it looks like a great alternative that is straight forward.