I was shopping for a used Porsche 911 and had listed every used one from $40K to $60 in Southern California. I came across one that I didn't reconize and it didn't have a price tag (typical for the Porsche dealers). I ask how much - dude comes back and says $54K ... I look a bit harder and discover that it was in fact, on my Internet listing at $44K.

Dude jacked the price of the car up $10,000 on a whim. I showed him the error of his ways before walking out.

(Walter's Porsche in Riverside if anyone is interested)