We have a local online classified site that I had to stop using because of the stupid replies I was getting. I once posted some free carpet with my address, phone number etc.
First email I got was
"Hi
How much for the carpet? Are you in canada?"
I replied
"No, I'm in Australia but I prefer advertising free things in Canada. The carpet is free, the shipping is $1086. I had to get rid of it fast so I've already sent it to you shipping COD. Thanks!"
Then I ignored her frantic replies