Yep - the false escrow thing is an older scam, but essential to continue building awareness of. Lately Facebook’s audio-themed groups have been hit hard. These scams are relatively lazy, but they work by spamming volume - a certain percentage, however small, might fall for it.
The FB scammers steal pics of desirable equipment and simply "list" them as ads on the target group. It’s always recently-joined members with no real group contriubutions. No corroborating info or feedback links, of course. And usually too-good-to-be-true pricing. The VPI group recently got hit by a wave of ads for cheap Avengers (many using the same pics), and unfortunately someone fell for it, to the tune of ~ $2500. There is a Tannoy group also getting inundated by scam listings.
The other one is to be wary of, when selling, is checks of any kind. NEVER accept a check for more than the agreed amount, no matter the excuse.