The purpose of a buy nothing group is to give away free stuff in the easiest and fastest way possible. That only works if it’s a local community where people can meet up or travel a short distance to the person giving away stuff. That’s why buy nothing groups on facebook for example are grouped by zip code or general areas within a given city.

I’ve never seen a buy nothing group where people discuss things. People post only if they’re giving away stuff or if they are in need of something. Discussions can be done on a thrifting community or something similar, not a buy nothing group.