Here in the Colonies/North America/USA there is the Craigslist for locals, the Reverb/eBay (but the shipping of gear for Reverb & eBay is painful), the local ham radio swap meets/ham fests (shout out to https://www.electronicsfleamarket.com/ (AKA eFlea or EFM friends), but I have not had much success. Yes, I have been able to pass some nice speakers off to new homes but there is other gear that needs to move on.
Thoughts/recommendations appreciated - TIA!
Craigslist has worked best for me. Offerup is mainly used by young people who aren’t into HiFi. I was able to offload $1000 worth of speakers over around a week using Craigslist.