Over the years I've sold a lot of stuff on Craigslist, Facebook Marketplace, etc.
I always list the dimensions, and tell people what kind of vehicle they'll need to move it. If it's large and heavy, I always tell them in the ad to bring help, because I'm not going to do it. And when I confirm a sale by phone or text, I always do the same.
Only once has it worked out weirdly, when a lady showed up to pick up two large dressers I was selling, in a-- you guessed it-- Honda Accord. When she showed up she said, "Oh, I guess those won't fit." I was like, "Uhhh, yup."
She said she had a friend with a truck and asked me if I would hold it for her. I said she could do whatever she wanted with the furniture after she paid me. So she sort of grudgingly agreed to pay me, and then took off. Came back a few hours later with a friend with a small SUV and not a truck, and I was skeptical, but sure enough, they fit. Of course her friend was an even tinier lady than she was, so I ended up helping them load it.
But surprisingly, that's the only time out of a few dozen that things went weird.