Selling towers - keep getting bad actors/scammers when doing local pickup only.

Only good experience with local sales on Audiogon...though none past 1+ years...

Have a conversation with them about the loudspeakers and their system. When they come to pick them up let a friend know and arrange to contact them after the sale.  The buyer with $4k in cash has more to worry about being scammed then you do.

Selling tower speakers and other high-$ gear locally just takes more time, usually to find a buyer.  Any local ad I make always includes "Cash or Zelle in person" in the ad.

In y experience, the serious buyers are usually easy to spot when they ask a simple question like, "When can you show/ demo these."  On FB, you can also see their profile, what town they live in, if local, sometimes they list their employer, etc.  You can see that they are a real person and perhaps someone with means if they have pictures of their other audio gear in their FB page.

Is Zelle really safe? I read where the buyer could tell the bank the transaction wasn't authorized and that would be a chargeback with Zelle

Another option you can explore that I’ve taken advantage of is selling speakers through a local dealer who sells used and vintage equipment as well as new equipment.   That way, you can still put an ad online, but you don’t have to mess with the buyers. Also, people have the option to listen to the speakers, and it exposes the speakers to a wider audience.  They charge 10% commission but it’s worth it.