One time, years ago, I posted a picture of a half eaten pizza on the craigslist "free" section and asked if anyone wanted it because I was traveling the next morning and didn't want it to go to waste and I received a bunch of hilarious messages asking about the pizza.
I once saw a woman post in a FB group to try to sell an opened and half eaten bag of roasted pumpkin seeds. She said she didn't like them but they were otherwise fine.