I Watched a special on TV about this and they have actually arrested and put in jail people trying to deposit these bad checks not knowing, then you have to go through all the legal mumbo jumbo and spend a ton of money to get charges dropped. It was a dateline or 20/20 special a month or two ago.
I got the same thing from an add on off-road.com....
My name is John Henry, i am Located in UK .I'm interested in buying your bike for one of my client and I have a shipping agent that use to ship the Items that I bought from US so don't bother yourself about the shipping and the titles, my shipping agent will take good care of that. I want it to be delivered to my client as soon as possible so I'll call my client in U.S to send a Cashier's cheque to you soon. I want to know reason why you want to sell it, also i want you to send your bottom price and brief me a little concerning the condition.