I used to sell items on CL deeply discounted to remove friction from the process. Still had too many scammers and people offering insultingly low amounts for wildly great deals. I was just too offended to keep going. Now I figure I’ll either gift items to people I know or give them to family or donate them. I just can’t be bothered to put up with bullshit (and I’m fortunate in my situation to not need to recoup as much as I used to in the past).

Edit: btw good luck!

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.