Decent + Facebook? Hmmm...
I detest it, with a passion. I occasionally sell stuff on FB, as a last resort, but my account is deactivated 99% of the time. Unfortunately, FB has led to the demise of places like this. It used to be mega busy on here, with amazing sales posts etc, but loads of people jumped ship for the immediacy of FB and struggle to leave, due to FOMO. Thankfully, this place has stabilised and we have a great community.
There are some decent groups, with lots of helpful, genuine people e.g. Jabba's Court, Echo Base, Vintage SW Palitoy etc. It's a very different experience, though, with a fair amount of pedantry, rules, dick-swinging, sycophantic behaviour (mostly towards the 'celebrity sellers' group moderators, etc). Posts/info get lost in the ether very quickly, unlike the forums, which are an absolute mine of info, if you're prepared to take your time.