I second the guild newsletter. My guild is mostly (old) women (my guild has 2 men in it), so it should be a safer group of people reading the ad. I would not want to deal with a total stranger with $700. to $1,000. worth of merchandise at 82 years old. Facebook marketplace is essentially the same as Craigslist.
I've sold and bought sewing machines on Craigslist and Marketplace, but I'm not yet 82. Just from the description of all the things she doesn't do, says to be careful.
bk