We've received word that there are some Nigerian (or African, British or yes, even Canadian) fellows contacting the persons who have ads in the Soup classifieds wanting to buy motorcycles with cashiers checks sent from Nigeria or other foreign points. They may also have someone in the US who will send a "US cashiers check" to a seller for payment, with all sorts of tasty details like you can keep an extra couple grand if you'll cash the check after they take the bike etc, etc.
Based on every press report on this subject I have read, 100% of these situations are scams. The cashiers checks are fake, and after you've given someone your bike and title, and they are several states away by the time the discovery of a fake check is made, your recourse is limited.
Moreover, there's plenty of reports of these fellows asking you for your bank account information so they can wire funds into your account, but in some cases using that info to actually extract cash from your account. Ever tried to stop an auto withdrawal from your bank account? It can be nightmarish.
So, buyer beware. And seller!