I've sold a lot of equipment from my home.
If it's through a local media like craigslist it's always from the garage..
If it's from Audiogon / USAM , it's from the listening room. I always have the person give me a call to discuss before the meeting.
For the record, this hobby seems to have a fair amount of introverts ,
I remember may years ago taking my eight year old daughter with me to buy an amplifier from a local seller, (she had been with me for a handful of transactions since her mom worked nights. weekends), as we get in the car to leave, she asked me a simple question about the upcoming transaction "are they weird"