I listed my Saab for sale in NJ (USA) on saabnet.com and got a suspicious email. The writer's English was bad. He asked if he could send a cashier's check (alarm bells!). Then he claimed he was in New Zealand! I suspected and then confirmed that New Zealand requires all cars to be right hand drive. I replied to him with the web page I found, and his ISP said his account is de-activated.
Not that I would have fallen for this guy, but it was still a bit creepy.