There is one guy who keeps posting good cars worth $15-$30K for $6K-$13K.
He mostly puts ads in Kijiji (London, Toronto, Kitchener, Montreal, Edmonton, Ottawa).
All his prices are in the $7,000 range.
Most of the pictures are stolen from cars actually listed in Florida or Texas. Sometimes he messes up, and puts the VIN number in his posts (obvious copy and paste). If you google the VIN, it usually comes up with the real ad in Florida, or Carfax, which indicates which dealer has it.
If you tell him, forget about shipping etc, I'll fly over and just buy the car in person. He won't answer.
If you see such cars, report to Kijiji. They have a "Report illegal/infringing Ad"
button for each ad.