Tried eBay?

It's scam/scalper-ridden too, and the fee + shipping hurts, but it's at least moderated. I've had success there. Just be vigilant about documenting your sales with photos/videos.

Sometimes there are niche trading forums that are still live. I'm considering one for used photography equipment.

But yeah. Craigslist was never a high bar, yet the loss of it to FB marketplace feels like a tragedy.