Shit, why didn't you act?! MILLIONS OF DOLLARS ARE AT STAKE!!!
Ahem. Carry on.
Actually in seriousness, these scammers are giving the whole country of Nigeria a bad name. There are people on eBay who won't sell to Nigerians, and put disclaimers on their lots to that effect. And this must have been posted before, but this is worth a laugh:
http://www.419eater.com/